with the recent ECB rate increase, all mortgages rates have increased. mortgage lenders left a window whereby new application's had a few weeks to close at the lower rate which is generous enough, if you do not close within that time frame then the higher rate applies. its standard enough, and given that there was a delay due to a change requested by you then the mortgage lender will insist upon the higher rate... have to reiterate what other posters have also said, if you think 4.19% is to high then opt for a tracker variable rate , which will be around 3.35% to 3.65% depending upon your lender or Loan to value.