Hi Mike - no reason for you to remember me, but I worked for Raleigh America, and was at Ilkeston sometime in early 1980. I ordered two framesets, one 49.5, SN 4193, the other 58.5, SN 4190. I still remember Gerald's comments when I have him Sheryl's dimensions - "We'll make it as small as we can, then we'll give it a hot wash."
Here's 4190:
It was delivered late in 1980 - I was still in hospital with multiple fractures of both legs, resulting in a less than perfect fit, but not the fault of Ilkeston, LOL.
If Gerald is still with us, and you are in contact, pls remember me to him.
Also, IIRC, Ilkeston built two BMX frames for us. One was wrecked in Amsterdam at the show, the other I'm trying to chase down at the moment.