Form OS1 is the application to HM Land Registry for an official search with priority over a whole registered title, and completing it means working through ten numbered panels using details copied exactly from your most recent official copies, then submitting the form electronically for £7 or by post for £11.1GOV.UK. HM Land Registry: Information Services Fees Once accepted, the search locks in a 30-business-day priority period during which no one else can register an interest that would outrank the buyer, lessee, or lender named on the form.2GOV.UK. Practice Guide 12: Official Searches
The form is available as a PDF from the HM Land Registry website and can also be completed digitally through the Land Registry portal or Business Gateway.3GOV.UK. Official Search With Priority: Whole Title (OS1) Work through the panels in order. Skipping one, or entering information that doesn’t match the register, is the fastest route to rejection.
Panels 1 to 4: The Property and Its Owner
Panel 1 — Local authority. Enter the local authority that serves the property. Where more than one authority covers the area, use the one to which council tax or business rates are normally paid.4GOV.UK. OS1 Form
Panel 2 — Title number. Enter the title number of the registered estate, or the number allotted to a pending first registration. This alphanumeric code uniquely identifies the property. You’ll find it on the official copies you already hold, or by running a title number search on the Land Registry website.
Panel 3 — Property description. Insert the full address including postcode. If the property has no standard postal address, use a description such as “land adjoining 2 Acacia Avenue.” What you write here has to match what appears on the register. A mismatch can cause rejection or, worse, a search against the wrong parcel.
Panel 4 — Registered proprietor. Enter the full names of the current registered owners exactly as they appear on the title register. If there are more than two proprietors, enter only the first two.
Panels 5 to 10: Fee, Sender, Applicant, Signature
Panel 5 — Fee. Mark the box for your payment method: either a cheque made payable to “Land Registry” or a direct debit under an existing agreement. Firms paying by direct debit will have the fee charged to the account identified in Panel 6.
Panel 6 — Sender details. Always complete this panel. Enter your name, address or DX box number, email, phone number, and reference. Professional customers such as solicitors should include their key number.
Panel 7 — Search from date. For a search of a registered title, enter the date of your most recent official copies. This tells the Land Registry to look for any new entries or changes made since that date. The date must fall within the definition of “search from date” in rule 131 of the Land Registration Rules 2003; an invalid date will cause outright rejection. For a pending first registration, tick the second box instead, and the search will run from the date the first registration application was received.
Panel 8 — Applicant. Enter the full name of each purchaser, lessee, or chargee who will benefit from the priority protection. For a company, use the full legal name rather than any trading name.
Panel 9 — Reason for application. Tick one box to confirm whether the applicant intends to purchase, take a lease, or take a registered charge over the property.
Panel 10 — Signature. If a conveyancer is acting, the conveyancer signs. Where no conveyancer is involved, each applicant signs individually.
Fees and How to Submit
Electronic submissions through the Land Registry portal or Business Gateway cost £7. Paper applications sent by post cost £11.1GOV.UK. HM Land Registry: Information Services Fees The fees are set by the Land Registration Fee Order 2024.5Legislation.gov.uk. The Land Registration Fee Order 2024
Professional users with portal or Business Gateway access file electronically; to use either service, register first for HM Land Registry’s Business e-services. Private individuals without portal access should post the completed form with a cheque or postal order to:
HM Land Registry
Citizen Centre
PO Box 7806
Bilston
WV1 9QR6GOV.UK. HM Land Registry Address for Applications
For applications that need manual handling, expect a turnaround of one to two days.7GOV.UK. HM Land Registry: Processing Times The Land Registry then issues an official search certificate.
The Priority Period the Form Buys You
Once the Land Registry enters the application on the day list, a priority period begins. During this window, no one else can register an adverse interest against the title that would take precedence over the applicant’s intended transaction.8GOV.UK. HM Land Registry Portal: Official Search of Whole With Priority
The period runs for 30 business days, ending at midnight on the 30th business day after the day the application was received.2GOV.UK. Practice Guide 12: Official Searches A business day is any day the Land Registry is open to the public, so weekends and public holidays don’t count.9Legislation.gov.uk. The Land Registration Rules 2003 In practical terms, that’s roughly six calendar weeks to get the registration application lodged.
If a third party tries to register a charge, restriction, or competing transfer during those 30 business days, the search applicant’s registration takes precedence, provided it’s lodged before the priority period expires. That effectively freezes the register in the applicant’s favour.
Practice Guide 12 advises applying for the official search at least five business days before the expected completion date. Order too early and the priority period can expire before registration is submitted; order too late and the certificate may not arrive in time.
The 30-business-day window cannot be formally extended or renewed. If it expires, the protection ends. A fresh OS1 application starts a new period, but any entries that reached the register in the gap between the old period expiring and the new search being entered will not be overridden.
What the Search Certificate Shows
The certificate returned by the Land Registry states one of two things. If nothing has changed since the search from date, it confirms that no adverse entries have been made and that no pending applications or unexpired priority searches appear on the day list. If entries have been made, the certificate lists those adverse entries and usually includes an updated official copy of the register so you can compare it against the copy you already hold. It also records the exact date and time the priority period starts and expires. Keep the certificate; your conveyancer will need it to prove priority when submitting the registration application.
Common Mistakes That Cause Rejection
The single most common reason the Land Registry rejects applications is missing or incorrect fees. In one review of rejection data, “no fee paid” accounted for nearly 37,000 rejected applications.10Today’s Conveyancer. HM Land Registry Reveal Most Application Rejections Can Be Easily Avoided For a paper OS1, that means forgetting the cheque or writing it for the wrong amount.
Other frequent problems:
- Panel 7 requires a date that falls within the rule 131 definition. Entering a date that predates your most recent official copies, or leaving the field blank, will get the application rejected.
- A single transposed digit in the title number sends the search against the wrong property. Check the number against your official copies before filing.
- If the address in Panel 3 doesn’t align with the register, the Land Registry may reject the application or return results for the wrong land.
- Over 10,000 rejections in one reporting period were caused by conveyancers failing to supply identity confirmation for all parties to the transaction.
Most of these are clerical errors that a review would catch. The Land Registry has noted it will generally only reject applications with “no prospect of success,” so a rejection usually signals a fundamental error rather than a minor formatting issue.
When OS1 Is the Wrong Form
OS1 covers a search of the whole registered title and is the right form when buying an entire property under a single title number. If you’re acquiring only a portion of a registered title, such as a newly built house on a development plot or a parcel carved out of a larger estate, use Form OS2 instead.2GOV.UK. Practice Guide 12: Official Searches An OS2 search must include a plan identifying the exact land being acquired. Filing the wrong form won’t give you the priority protection you need.