Ing direct changes after barclays took them over

Hi
I have a mortgage with Ing direct uk for a uk property in which i originally lived but then moved out as i was posted abroad. Ing then levied a 2% increase on the interest rate i was charged.
I have just noticed that this levy was now cancelled as i am now charged the old rate but don't know why. I assume its due to the barclays takeover. Any ideas? Thanks!!