Hi,
Processing the survey responses, I can plan the first outing from my list. The walk would encompass the Barbican centre.
Meeting point
Outside Farringdon Station around 10:30 AM.
Take the regular train to London Bridge then the Thameslink train for 3 stops to Farringdon.
The routeWe'll start at Farringdon, then walk about 1/2 mile to Barbican. We have potential diversions to Smithfield, London Wall or Charterhouse square.
I grabbed this from the Barbican website:

We'll likely start around beech Gardens and end at point 5, Gilbert bridge.
Will research some prospective places for Lunch in the area.
We can then proceed eastward to Moorgate where you can take the Circle line to Cannon Street or Charing Cross via Embankment.
Last time in London we explored 'The Ned' and 1 new Change by St Pauls, open to suggestions of places to divert to.