Just that!
There are a couple of local agencies, but we tried one and they were really annoying (kept cancelling, would call me three times in a day when I was at work) and the other one doesn't have a good reputation.
Last one is retiring and we were recommended by a friend.
I put a post on my FB and a mildly flaky school gate mum said she'd do it so I am going to tell her we're sorted (not sure she'd work for us). So I can't try that again!