Thank you all very much for your replies and David (Myvalko) is looking forward to meeting you all.
Now for the details ...
The plan is to walk around Greenwich a bit starting with the view from the Royal Observatory and possibly pausing for other entertainments nearby, then back down the hill towards Greenwich town playing it by ear with the following to choose from depending on how we're feeling, how long we take and, of course, the weather: the Indoor Market, the outdoor markets, the National Maritime Museum, the Cutty Sark, walking under the Thames through the Greenwich Foot Tunnel, a walk around Canary Walk and Docklands etc. There are plenty of places to pause for refreshments or bites to eat though Greenwich can be quite busy on a Saturday.
I do not intend to make this a 'route march' by any means since some of us are advancing in years so I'm by no means proposing that we get round the whole lot! A gentle stroll at whatever suits is what I have in mind. Some of us might decide to carry on for a bite to eat for dinner later on but we can work that out on the day.
The meeting point will be in Cafe Rouge at the front of the Hotel Ibis at 30 Stockwell Street, SE10 9JN. Since it gets dark just after 4pm we'll meet in Cafe Rouge at 11.00. If you're coming by mainline train to Greenwich station from London Bridge or coming via the Docklands Light Rail to Greenwich tube station, turn left when you come out onto the street and walk a couple of hundred metres until you see Cafe Rouge on your right at the second(?) crossroads. If you're coming by private helicopter would you very kindly pick David and me up on the way please?
My mobile number has not changed for a decade but if you don't have it please drop me a PM and we can exchange numbers. If you can't make it by 11.00 or you're delayed then please contact me so that we can guide you to where we are.
Looking forward to seeing you all on (this) Saturday 16th December at 11.00 at Cafe Rouge in Greenwich.