Thanks to all for past suggestions. I have a last request for this trip, as indicated in title/subject.
I have had solid sole @ The Ivy years ago, but they are closed for renovations, and actually had a superior dish in Alderly Edge a while back.
Looking forward to following on any missed suggestions on next trip.
(Come to Montreal/colonies on a vacation...your strong £ will make it a very quality/reasonable trip.....and great eats!)