Ok, if you really want to cut your bills you'll have to embrace this , but it will work.
many of the audits i do , people get the shower times wrong ( not saying you have, but worth checking) Its worth getting a shower timer without the other's knowing and time them separately. Guaranteed its longer than 2/3 minutes.
6min mixer shower will on average cost £74.51 per year based on 1 x shower per day per person ( standard tariff and average energy consumption)
10min = £124.19
15min = £185.28
20min = £247.38
remember thats 1 shower per day per person. you have 5 people and how many does each have per day?
you can also fit a shower save ( restrictor) which will reducer the output to 6 ltrs a minute ( usually run at between 12- 18ltrs )
Baths will use on average 80ltrs of water as opposed to a 5min shower that will use on average 40ltrs.
wc's are good as dual flush, but make sure you have a bin in the bathroom as people tend to use the toilet as a bin then flush away.( again not saying you do!)
30% of your household water gets flushed away down the toilet.
Have done many audits where customers say to me "if its yellow let it mellow, if its brown flush it down" ( not my advice!)
Dishwasher - Its a life style choice i know , but not a necessity. do you you the same programme all the time? Eco? A lot of audits where the bills are high have heavy use of a dishwasher. The eco wash will use little water but doesn't clean efficiently if heavily soiled, so most people put onto the "pots & pans" programme. this will use on average 15lts or more as opposed to a 6ltr washing up bowl. Added to this the electric with the machine on for an hour or two plus the dishwasher tablets.
As you washing machine is new its more efficient than an old one, and having 5 x people in the household doesn't help the loads , but would say try and do a full load everytime or try and get a days more wear out of the old bake beans. Would recommend to anyone who's looking at buying a new machine to try and spend a bit more on capacity. getting a 12kg machine will save you doing 2 loads in a smaller machine , cutting down on water , electric and powder. More efficient long term.
Brilliant stuff. I shall be reading this to the family tonight.
Many thanks.