Thanks Giles and Maggi - you've given me starting points, and yes the ES number is on a Mec. so that's an easy one as I've got two contacts in the Mec. group.
Chris Chadwell is proving a little more elusive so if someone does have a contact point I would appreciate it. I've a couple of acers with CC numbers and it would be useful at his stage to know what sort of size they are likely to make. I'm not finding Chris in 4 of the recent Journals, and Mr Google seems to know a bit about him, and lots of his namesakes, but nothing directly.
Cheers
Rob