You will need an emergency repair kit for your car. This will help you change any punctured tyres or cope with any other issues. Hopefully, you'll never need it, but it's worth bringing just in case.
I recently discovered that there is a swimming club at this lido and that its members meet around Christmas for a one-day race. However, from May to September the club is open to non-members from 10am to 6pm daily but only at the weekends and bank holiday during May.