The mortgage we took out two years ago (2 year fix, ~60% LTV) had a introductory rate of 1.2%.
That falls back to 3.something variable in September. We'll probably look for another fixed but current 2yr fixed rates seem to be around 2.3% (plus a £1k application). That's an uncomfortable increase on a big loan.
What's interesting is the rates on bigger loans (eg 90% LTV) aren't much more (2.4%+application). That's not what I'd expect a bank to offer if they expected a bursting bubble.