EPB problem

If this has been answered elsewhere, apologies but would be grateful if someone could point me in the right direction.

I
have a 1.8 C-Max Ghia 56 plate. When I started the car tonight, the EPN
failure warning displayed. It was only for a moment and I am still able
to use it as per usual but when I release the EPB, there is now this
new noise that accompanies the usual whine, a bit like a squeak/creak
(sorry, can't describe it only that it wasn't there before the failure
warning came on)

Has anybody else had this and should I be rushing to the dealer or treat it as a one off glitch?

Thanks in advance