The Sharks are a wild-water canoeing and kayaking club based in West London.
For several years, they have been operating weekend kayaking sessions at the National Trust park in Osterley House.
The sessions are incredibly popular. However, they do take place in a fairly remote part of the old house's ground, by the middle lake.
I created a banner ad to be sited in the cafe which is run from the old stable building.
This advert would draw families attention to the activity.