Breeze to the Thames Barrier Park North

A longish ride with a bit of challenge in terms of distance. We will cycle over the top to Greenwich and then drop down towards Charlton where we'll pick up the C4. We'll continue to Woolwich, and have a coffee stop at the Woolwich works, before crossing the river on the ferry and make our way to the Thames barrier park north. If this café is busy, we'll stop at the park on the North side.
We'll return via the Royal Docks, taking the bike bus through the Silvertown tunnel, and continue along the Thames path to Greenwich and then the Waterlink way back to Catford.
Bring a lock in case we leave the bikes unattended at the coffee stop.