The community allotment was short of volunteers to do the watering weekend, so Sheila stepped into the breach. Armed with a potential replacement key for the tap (the previous one had gone missing), I tried it on. I was delighted to find it fits! First priority was to start filling water butts which were getting very low. While these were filling I did some watering using the watering cans. Still more filling to do, but at least the butts are useable now.