I have the same background as you, BE Civil 2002,and also went for law.I've one more fe1 to pass. I studied engineering law as part of my degree also,and am trying to focus on this aspect. I have signed up to do an online course in Construction Law in Aberdeen, so I don't have to wait a year for the Trinity course.
I would caution against doing the fe1s. I presume you've read the other thread and the difficulties other people are having getting an apprenticeship. The problem for a non law law graduate is that you can only use them to get into Blackhall they're no good for anything else.After 5 years they expire,it's not a qualification for life.If you do them you will probably have to take time off work.I have not given up on Blackhall, but doing fe1s is standing out like a sore thumb on my CV. Employer's are probably questioning my motivation and I think it is proving harder to get back into the engineering industry, which is necessary for financial reasons.
Also I think Quantity Surveying is a much better qualification, there is more management potential and has more crossover with law etc