Apologies for the late reply. It is difficult for someone to switch to frontline banking after a few years in audit, because your pay in an audit firm who would reached a certain level but your skill sets are not directly relevant to front line banking. If you were to switch from an audit firm to supporting roles in banking say risk management etc, that's ok but the chances of moving to say asset management, investment banking, trading etc would be very slim.

It really depends what your calling in life is, life in front line banking is generally more stressful but rewards better. Life in the supporting areas of banking is generally more stable and less pressurising. Banks still pay good money for areas like risk management and internal audit, but the bonuses will be significantly less than front line. Front line staff generally get between 6-36 months bonus or even more, while support staff will be lucky to see 12 months.