Keeping the lawns in good nick

Owing to the very dry weather, the sprinkler system has been filled and tested. (Essential maintenance is allowed under the current Government

Sprinkler #15 (far corner of lawn 2) has also been repaired.  Soil had jammed the mechanism. This means all sprinklers are working. We haven't had that for a long time.
 
Following Russel's guidance,  the programme has been set for two irrigations per night. One comes on at at 5pm (1 min corner and 2 mins sides) then the second one at 11pm (2 mins corners + 3 mins sides). This runs for slightly less time and therefore uses slightly less water than our standard program (3 mins corners and 6 mins sides). 
 
Now the sprinkler system is operational, Russell will put down a feed in the next few days.  He will also finish putting the grass back around the repaired sprinkler.  

The water consumption reading showed that we had used £0.02 worth of water over this winter. Any ideas as to how we can make some savings?

Richard Peperell