Forgive me if my 54 year old memory is failing me, but weren't you under some sort of self-imposed FT BAEC exile until after 9 June (or thereabouts)?

To the OP - British Civil Engineers are still widely respected and very much in demand worldwide. If you have a full-time overseas contract of employment, and observe no. of days visiting rules, you can achieve non-resident for (UK) tax purposes status into the bargain.