If you enjoy your work then it becomes your social life as well, if your workmates are celebrating a special event then you share the joy with them, if you are stil fit and well I feel you should carry on working for as long as you want to and are able to do that job fully.
you will know when you are ready to retire and there is no date attached to that
I wish you a long and happy retirement , when you are good and ready
Estranged Son and Future Granddaughter
To think that London, or anywhere else for that matter, does not belong to any one demographic