Whether you are visiting Olympic Park or just looking to keep the kids occupied head down to Billingsgate, take a picnic but be sure to pack a mackerel (the fish market closes at 8.30am) and when you spot Sammy the seal (although most likely Simone) throw the fish at her. She has been hanging around here for a few years and why not with all that fish around? You might see porpoises and the odd dolphin too....
River Thames between Canary Wharf and as far in as Vauxhall Bridge. West India Quay on DLR and walk along the docks.
Google map: bit.ly/QdJAzO
Is this your business?