Spouse visa name change taking a long time - what can I do?

[cw0984]

My wife submitted an application for a surname change on her spouse visa in the first week of October.

We have had the visa since January 2012 as an unmarried couple but married in April 2012 - hence the change of name.

Within a month they asked us to re-submit biometrics - which we did immediately.

A month on we have heard nothing more and they have had the application including her passport and marriage certificate for more two months now!

We are due to travel in January and thought we had plenty of time but we are getting concerned.

Is there any way to chase this application and does anyone know why something so trivial is taking so long?

Thanks in advance,

Chris