Sorry, I should have made it clearer in last post. In this context, ME means Military Establishment, so ME 29 is Military Establishment 29 etc. They are not, as I thought initially, RASC units, although some RASC people served in some of them. They were also not all in the Middle East which, as you rightly say, in another context, is abbreviated as ME hence my earlier question whether it was MELF as in Middle East Land Forces.
maxD