I would appreciate any opinion if I'm getting a good deal on the mortgage.

It's a tracker (not variable rate) at 4.49 percent above bank of England base rate. Currently comes to 4.99 and it is the rate for 15% deposit mortgage.

I'm expecting the base rate to rise a maximum of 2% by the time the tracker runs out. Is this a sound assumption?

BTW, the mortgage is being arranged through a mortgage broker since none of the direct bank deals seem to come even close.

Thanks for any thoughts.
Additional Details
Yes, we can afford the mortgage if the interest rate went up by 2%, that was the whole reason for getting a tracker.

My reasoning for getting a tracker over fixed rate: fixed rate mortgages are generally several percent above trackers in interest rates.

For example: if you choose between a 5% tracker (4.5% above base rate) and a 7% fixed rate. Lets say that bank of england base rate will rise 3% by the time each mortgage runs out, taking tracker rate to 8%.

Scenario: bank base rate rises 1% after 6 months, 1% again after 1 year and another 1% after 18 months.

Calculation on fixed rate (2 years): 24x1300=31,200
On tracker: 1100x6 + 1200x6 + 1300*6 + 1400*6 = 6600 + 7200 + 7800 + 8400 = 30000

All figures are approximates ofc. I would also do overpayments while the rate is low further increasing the savings. Think the economists call this "cost average effect".

Anyway I wanted to know if I'm getting a good deal in comparison to other trackers available (not variable rates).