About the mortgage, I suggest to use fix mortgage, most of the people use fixed mortgage because it is the easier to budget the spending every month. Plus you are not worried about the interest rate will go up. I suggest you to find another broker to do the search, I am sure you can find a better interest rate somewhere.
Most of the broker you get from the estate agent, they are not full of the market broker, which means they only have very limited banks or building society to choose the interest from. Plus they are not charging you the fee but they get the payment from the bank whom give you the mortgage.
If I were you, I would ask the broker which bank or building society are not included in the search he did. Hsbc and a few other banks do not give quote to the most of the broker. So it is wise to go to HSBC to get a quote youself.
FOR MOST OF OTHER PEOPLE WHO HAVE QUESTIONS ABOUT THE MORTGAGE, YOU CAN PM ME, I HAVE MORTGAGE ADIVSOR CERTIFICATE AND KNOWLEDGE ABOUT THIS .