Finding tutoring in Maths / CS I am technically enrolled on a university course but lack basic maths ability and have fallen behind in trying to catch up. Therefore I need to explore self-learning to improve my position while continuing my university course. 

I'm looking for a math / computer science tutor to cover areas of discrete maths; number theory / proofs and counting plus others. Other suggestions for helping me come up to speed in these areas might also be helpful. 

I'm a mature student and am keen to put the hours of work that are needed. I have some materials but there aren't enough examples provided to help me to understand better.

How does one find tutoring and other supplemental aid for otherwise engaged students in these areas? Does online tutoring exist?
I realize that this isn't a perfect answer since it may lack the personal contact with an instructor that may be the most valuable. However Coursera has a number of courses that might provide the necessary background if you can match their schedule. 

In particular Combinatorics and Probability should teach you sophisticated counting techniques. 

They also have a series of courses on Discrete Math for Computing that probably covers the rest. (Combinatorics is one of the courses in this sequence.)

The downside, however, is that you don't get much in the way of a personal touch that you get in a face-to-face environment. 

Some of the various online course sites provide some tutorial help and more provide peer-to-peer contact, but the quality of the help you get with that is likely spotty. It may help you get over some of the humps, but will be less valuable for building mathematical insight.