You can also see the guttering from the shed (I'm just about to cut this down to feed the tank directly) and some of the older waterbutts. Note it's a black tank which apparently helps to reduce algae growth.
To use water from this tank or the waterbutts (which I'm still using - with our current weather forecast for a long hot summer I want as much water available as possible) there's a choice of filling watering cans, which takes ages, or a hose - pumped by a 12 volt bilge pump powered by a portable 12 volt battery pack (a bit like this one). I can also use the pump to fill the tanks from the stream when it's running.
Future plans include a solar-powered charger for the battery, an automatic level switch to trigger the pump and keep the tanks filled (although to be honest I only need to do this occasionally) and some automatic drip-fed watering for the patch while we're away. The more beds I cut the more watering is required so anything that cuts down the labour is good for me and the plants!