Thanks all for the replies. I do suspect that, as with other issues I have from running, etc. that work with a physio and the right exercises and flexibility will change things a lot. Seems as though these problems are as a numerous as there people who have them.

As such, I've decided I really do need to try to have it diagnosed, since it has been hanging around for a couple months. Having had a good winter and a promising start to the year, I've lost a good chunk of the summer and would love to be able to ride again at least a bit when I'm in the Dolomites for work in 6 weeks...