With the council tax you can check your neighbours tax band, if your properties are similar in value they should all be the same band. I looked on a Martin Lewis website to find the website to check.
Also if you're a single (adult) occupant you get either 20 or 25% off of the bill. Contact your council if you're paying the full fee.
With the water I've found my bill is far cheaper using a meter, the cost was more than halved for me per year.
Also if you contact the local water board they will send out heavily discounted or free, water saving devices.
Or if you're on a meter simple things such as a weighted down container (ice cream tub?) or brick in your cystern, so that the water amount is reduced per flush.
I run my hot tap into a bucket whilst I'm waiting for it to get warm, you can use the collected clean cold water for pouring in the washing machine as it's filling up, or pour into the cystern after it's flushed if you have a removable lid to it?
Turn the tap off when cleaning your teeth, don't have it running continuously, just rinse the brush & turn off each time.
Time your showers, to reduce water consumption, try & spend 1minute less in there & that'll save water too.
Wash up with a full bowlful of dirty crockery /cutlery at the end of a meal/cooking session, that will save water & heating lots of small quantities of water too!
Also if all of your roof/guttering water goes into a soakaway (stone/brick type drain a few meters away from the property usually hidden underground) & you collect water in water butt(s) the water board give you a discount as its water they're not treating through the sewerage system.
Also if you own your own property/mortgage if you have an electric post, pylon or overhead cable on/in your property then you can claim a wayleave payment from the supplier, I don't think its much, but it all adds up, but I have yet to do some digging on that!
Oh & if you're an emergency services worker/NHS etc, you can get a 'blue light card' which offers discount on many online & store purchases. Think it's a small fee for 2yrs membership if you register with your NHS/police/coastguard official email address& official postal address. Same idea as a forces card I think?
Oh & finally if you have to launder your own work clothing with printed or embroidered logo's on it, you can claim back about £60 a year on tax, just write to your tax office&say you have no work facilities (only if you don't) to launder it, how long you've worked there, employee PAYE number, NI Number, work & home address and they'll adjust your tax code to reimburse it, I think you can go back 3yrs but ask if you can claim the maximum time limit back if applicable?
Don't forget if you're giving to a registered charity, that you can give them 'gift aid' on donations if you're a standard rate taxpayer, this gives them 25% more at no extra cost to you, as they're struggling for donations too.
Hmm can't think of anything else at the minute...
Bet you're all glad, this post goes on a bit! I'm such a tight wad! Lol! Xx