The use of water from the standpipes is included in you plot rent, but please be aware that other users may need to use them. You can use the standpipe but you can not attach a permanent hose connection; the tap should be available to all nearby allotment holders. However, it is advised that recycling rain water is a better option, as the natural water is better for plants, if you have the option to gather rainwater from a shed or greenhouse etc. look to obtain a waterbutt for your plot, these are readily available in shops and through the council. Remember the more you water the more the plants will rely on it so better to be conservative.