2nd purchase

I currently own a leasback property in a refurbished development and am considering a second purchase in the same development, an apartment that is 2 years into a 9 year lease agreement.

I'm wondering;

1. Is there any advantage/disadvantage in purchasing a property during the term of the lease.

2. Is there any tax advantages in having a second property inm the same development.

3. Can you extend an existing mortgage to cover the second purchase or do you have to take out a new mortgage (with Barclays).

Thanks,

REGAN