Mortgage - renewal query

Hi there,

I wonder if somebody could offer some sensible advice regarding my mortgage please? I had a 2-year fixed rate deal (was 4.09%) which has now come to an end and decided to stick with my current lender (Natwest), they have offered me two I'm interested in:

2 year fixed rate, initial rate 3.59%, 4% APR, no fee
5 year fixed rate, initial rate 4.09%, 4.2% APR, no fee

So essentially I'm assuming I could carry on at my current rate for the next 5 years, or get a slightly cheaper rate for 2 years. My loan to value is 75%.

Any recommendations? All advice welcome!

Aaron