Yorkshire Rent Assessment Panel 28 November 1989. Concerned infringement of right of first refusal for regulated tenants to purchase freehold under Landlord and Tenant Act 1987 s13 . Four self contained flats with three let to regulated tenants with fourth vacant. Sale of freehold in October 1988 to Structadene Ltd. Their interest was subsold to H for £18,000 with undertaking to complete sale with vendor. Transfer completed in December for £130,000. Qualifying tenants received transfer notice in February 1989. Section 11 notice served on H in March 1989. Tenants informed of transfer made for a consideration of £156,000. W served Section 12 purchase notice on H in April 1989. H suggests that purchase notice not valid as purchase price was misstated. Due to the complexity of the case, the notice was deemed to be valid. It was held that original disposal for Section 11 purposes was the December transfer between vendor and H. Interest not payable on purchase price from date of completion