...dead easy - simply ask to be tranferred back to the UK. When they ask why, just tell them you have an on-going query which you would find easier to deal with if you talked to somebody back in the UK. I do this all the time and its stopped my frustration with dealing with people who'se name you can't prounouce, spell or understand, let alone trying to explain something financial to them.
The banks are more and more realising that UK customers don't like dealing with Indian Call Centres, so the more people ask for their calls to be sent back to the UK, the more banks will realise that they're on to a losing battle with Indian call centres and shut them down.