Geoff and Dave,
You were both right.
I originally followed the subscribe / renewal / rest of world links from the model-engineer website. As Dave says the offer there (V153) seems to have expired.
When I followed the link in the renewal **letter** (bold would be nice Dave), I managed to re-subscribe with no further worries.
I hope you haven’t lost too many subscriptions with people getting caught in the trap and simply losing heart.
Anyway, Mischief Managed! (Happily resubscribed now)
Thanks to you both for the rapid and helpful responses.
Richard