Bath tap leaks. Fixed cap, so cannot gain access!!!?

[Domenico]

I have a leaky bath tap. I cannot remove the cover cap, as it comes as part of the tap itself. I have tried allsorts and cannot figure-out how to gain access to the guts of the tap to see if a washer needs changing or otherwise. There is no clear way of getting-into the tap (ie, grub screw)Help! :?: