2 electricity supply numbers ...one meter

Gerry1

The bad news is that you've probably inherited an inapproprately set up wiring / metering system, hugely expensive tariffs, and that you may be paying on Receipt of Bills (ROB?) rather than via Direct Debit, hence the crazy rates and standing charges.

The good news is that it should be quite straightforward to sort it all out with some simple wiring changes, and possibly an extra or replacement storage heater.

Also check the immersion heater(s).  It should be connected to the E7 circuit.  If there's another one halfway up the tank it should only be used for half a tank of expensive hot water if you messed up and the water has gone cold in the day.  Its switch (possibly labelled Boost) should normally be off.

Verdigris

I suspect you originally had an antiquated system, used by some suppliers, that used two separate meters for peak and off-peak. Those have, presumably, been changed for the multi-rate meter shown in the photo. However, as quite often happens, the records haven't been updated correctly and you are still paying two standing charges when you should only be paying one. I reckon you are due a huge rebate for the suppliers mistake. I'd invest a bit of it in replacing the wired fuses with trip switches, at the very least. Then move to a supplier that doesn't charge the extortionate rates n-power are charging you.

Rosie1001

Got a gas water heater so not connected in any way 

do I speak to a electrican or n power ?? Do I need new meter or just new wiring configurion 

also ..any idea why the reading that’s been 00001 for years suddenly is reading 00005 ??

Verdigris

Just looked again, at the bills, and I wonder if the single rate bill is somebody else's meter. (I can't tell as you've redacted the meter numbers - are they different?)

You say you are in a flat. Are the other meters all together in one place?

Rosie1001

It’s a self contained terrace flat .. my meter number is same as the bill 

upstairs to me have their own meter ...

Gerry1

AAAAaaarrrggghhh !  If you've got gas, why on earth are you using immersion heaters and storage heaters?

Install a boiler and radiators PDQ, even if you have to top up your mortgage.  Bills will be far lower, it'll be far more flexible (you won't have to be a weather forecaster), it will increase the value of the property and make it easier to sell.  Gas CH is a no brainer.

Why pay 17.5791p/kWh with electricity when you could pay 2.5p/kWh with gas??

Rosie1001

they can’t fit a gas combo due to  New building regs .. it’s just a mains Mersey type water heater which is on a bathroom outside wall .. 

they can’t fit a combI  there ,and there is no other outside wall Available to install one ..I did try and get it done when I first moved in 

Rosie1001

I will see what npower say at meter check .... and then get a electrician in to see what can be done ... 
might be better just to turn them off and use oil filled radiators , I’ve got a couple I could use  ...might be cheaper  ...do you think. ?? 

Just for now , until I’ve got funds to upgrade to new storage heaters , they are more efficient apparently..I’m presuming the same wiring will be used to shouldn’t be too much to swap them over 

Gerry1

Rosie1001 said:

do I speak to a electrican or n power ?? Do I need new meter or just new wiring configurion

As you have a 4-rate meter it may be possible for npower to reconfigure it so that everything is on E7.  That would avoid any rewiring.

Rewiring would be an electrician, but should be straightforward, Covid permitting.  But gas CH is the answer.

Leave the NSH input to maximum, turn the output to minimum when you go to bed and open it up if it's chilly in the evening.  There's a boost button on the meter, so you could press that until you get gas CH if it gets chilly in the evening, although it would be at daytime rate.

Oil filled radiators?  Nooooooo....

Hasbeen

Like this? 
27-17557-01.PDF (acwilgar.co.uk)

Yes there have been good reports on the newer type storage heaters like the Dimplex Quantum.:  Quantum Heater | Dimplex