Isnt the pitch currently watered with harvested rainfall ? I'd have thought it simple to bolt a few Solar Pamels onto the roof to help with the daily electrical consumption, but the sort of thing Arsenal have installed would cost the same as a few Players wages, so guess where that money would be better spent. Unless the Dockyard have a few spare Submarine batteries lying around we coukd use, I cant see that scale of Green energy happening.
Adams apparently re-uses the same Tactics each week. If that counts ?