West Midlands Rent Assessment Panel (WM220) 7 June 1988 Decision on the application by the tenant (W) for a determination under Leasehold Reform Act 1967 s9 , as amended, of the freehold price of a detached house . Three issues were in contention: 1) relevance of adverse differential; 2) whether reversion to be valued separately or ground rent to valued in perpetuity; 3) relevance and value of insurance commission . Adverse differential concept was held not relevant to the decision and the tribunal accepted valuation of ground rent in perpetuity as appropriate for present length of lease. W`s valuer argued that no additional value should be attributed to insurance commission, as he had never experienced it himself in the sale of freeholds and it was in any event, tenuous. The landlords` valuer referred to Re Castleberg Investments (Jersey) Ltd`s Appeal and provided evidence of letters and articles indicating that commissions and agencies are open to individuals. Tribunal held that th