Many thanks for your reply.From your picture it is the join between the flexi and rigid pipe that is leaking in which case I think you just need to replace the rubber connector - and think you need ‘ hose sealing sleeve’ replacement for about 3quid!
Exactly 😀If the water was only leaking outside and nothing leaking inside the caravan I’d leave it to leak on the grass, less to empty out of the wastemaster, when we set up I nearly always forget to run a pipe from the waste pipe to the wastemaster.
BP