Need some advice on a lease extension

[jphypno]

I have a landlord who historically has been a pain and I'm trying to get her to agree to a lease extension.

I have written to her on many occasions, 4 to be exact, to find out how much it would cost to extend the lease. I have just received a letter from her asking for £1500 per year of extension for a minimum of 20 years.

Now don't get me wrong, I don't know much about extending a lease. But £30K for 20 years!?!?!?! Has she gone mad?? Surely it doesn't cost that much to extend a lease.

I've got 67 years left on the lease & would like to extend it for a further 90.

Can anyone give me some advice as to what I should do??

Many thanks