Current deal coming to an end (Offset mortgage enquiry and some other help)

Hi,

I am coming to the end of my current mortgage term with TSB

Details:

Mortgage 165k
Value 200k
LTV 82.5%
Term remaining 33 years

I will revert onto the 3.99% homeowners variable rate next month but wondered if anyone knew of any significantly better deals out there? I could put the LTV to 80% if it would make a significant difference in terms of the interest rates.

I also cant seem to find any reliable details on whether offset mortgages are available for 80-85% LTV's? I like the idea of having accessible savings that reduce your interest rates. If one were available, that would be my preferred mortgage option.

Thanks very much in advance for anyone that helps, I appreciate the time.