Hi, am an independent mortgage broker.
The fixed rate period you select should be based on what your expectations are. For example are you likely to move say within 3 years.
Some of the 2/3 year fixed rates have the same arrangement fees and are usually portable to a new property providing certain criteria are met.
The problem now is that if property prices fall and your current mortgage was say based on 90% then your property valuation may not be sufficient to remortgage on the same basis which means that you would have to stay with in your case Barclays.
It may also be the case that Barclays may offer you a deal to stay with them.This deal may be slightly higher than another lender but after taking into account of the arrangement fees may be cheaper in the long run.
As mortgage brokers we are supposed to give you best advice even though this may result in our not getting any business from you so if Barclays offer you a better deal then you should stay with them.
Going on a bit! Best to give me a call on 01376 344421.