Hi,
Updated to Monday 8th August after discussions.
Meet at Limehouse DLR station at 10:30am (maybe a little later if weekday). Train to Lewisham and change to the DLR or go to London Bridge, Jubilee line to Canary wharf and take the DLR 3 stops to Limehouse.
For this trip, a leisurely walk along the Regent's canal from Limehouse to Victoria park, a less often explored route than the Camden to Little Venice section.

At the end of the walk, around Victoria park, there is a nice Cafe by the lake and at the north end of the park are a few pubs with outdoor seating. To return home involves a bus ride to either Stratford or to London Bridge stations.