I've got a cocker spaniel (4 yo) who is in need off a good cut. Can anyone give me a rough idea what a mobile dog groomer might charge please? Thanks in advance.

You could give these a ring and see the prices just search your area and it will bring up your local groomer.

http://dialadogwash.com/Home/

We use dialadogwash they are great - our shepherd cross is too big to force into our tub! We pay 38 per session but he is VERY hairy.