Ah, so the effect of the lease extension only keeps the ground rent same for the remainder of the original term? So, for buying the freehold reversion, If a house had an extended lease with current unexpired term of 78 years (without extension it would be 28), would the marriage value be based an 78 years or 28?
Does anyone (paging Jeffrey Shaw!) know if a lease extension affects the enfranchisement of a house? Eg if a previous owner had extended the lease by 50 years, would the cost of reversion be based on the original term, or the extended term?