Any input on whether it would be worth applying for a PhD in computing?
I've just finished an MSc in IT, *but* I had not done a BSc first degree before that. This was completed on-line with Liverpool University.

Having reached 51, bored stiff with my current job from which I can take early retirement - I'd like to look into doing a PhD.

The question is, do you think that the lack of a first degree be a barrier to successful application? .... given that I do have a Masters and 25 years experience in the industry.

We're not sure what the position of the research councils, who fund most UK PhD students, would take, but they would probably be able to accomodate you. Contact one your the tutors from your MSc course for advice.