I’m not sure that there is much I can add to what has been said already.

If we can exclude that there is some fault with the meter then it would appear to me simply that the previous high billing will probably have been based on estimates.

I've sent readings in but their still coming back estimated well some ….

Although I will admit they would be pretty high estimates but not impossible.

(Another thought is whether there is/was also some debt-repayment plan or similar that we haven’t been told about yet?)

Isn’t it a concern here that the OP says that with the CU main switch off there is still power at the sockets? (As apparently evidenced by that microwave clock).

I've turned the mains of but the switches are all still on unless I turn every switch off in the trip box .....

Yes… I noticed that too...

Reversed polarity coming out from those two terminal blocks perhaps?
(Similar to the one Firedog posted on the PZH November thread).
It’s difficult to make out in the photos the wiring around those blockd (particularly the blue from the meter which just seems to disappear).

I gave up on trying to unravel that lot. However, how likely is is that, in many years of following this sort of stuff never having heard of the possibility of a meter engineer getting line and neutral the wrong way round, I hear of two instances in as many days?

I assumed that the photos were taken at different times, but we all know what assume means.

I’m gonna play it safe then. Time for the Joker Card. Got a few minutes ​@Lukepeniket_OVO ? I heard you’re enjoying RTS too much, but just in case! I bring milk and cookies! XD

Hey all!

Lots to unravel here... 

I see the rcd is in the off position and you still have power elsewhere? Is there any other CU in the property.

Looking at your CU also the 50A double pole mcb is unusual I've never needed to fit a double pole MCB ever?? (50A would tell me that there is another CU possibly not fed from the RCD).

I'm curious if you turn the 50A switch off do all of your other sockets go off?

I know it's all words and abbreviations which I apologise for. Your Metering set up looks OK other than a little bit of tidying up.

Without a visit from a metering engineer we would be unable to tell polarity from the photos and if we did visit it would be corrected on our metering installation and would still require you to call an electrician.

Hope this helps somewhat?

Hey ​@Tazzyy74 ,

Just letting you know that Luke has responded. Please allow me to introduce him. Luke is one of OVO’s Smart Meter Engineers, except that these days he’s rapidly becoming a Does Everything Engineer. :)

He’s also known as our resident Forum Engineer because he’s also on the Forum for whenever we need Engineer advice. We call on his advice whenever we feel it’d be most useful and this is one of those times.

We’re still here too, so feel free to keep chatting in this thread and one of us will swing by based on whoever we feel is the right person at any particular point.

I can't find anymore cu in the house but the shower which is old is connected as is the alarm ....  an electrician said who's due to come round that if you take the lid of the white box he said that's where it will tell you its been wired up . I've never used the meter I've only been in the house 3 yrs and my bills were fine I oweed 393.00 the next quarter on that was 814.00 from July24tg  to Sept 21 . Then the following month Oct it was 30.00 . Then November is risen again it's been 400 Then below 100 ever since .

I'm too scared to pit my heating on one because I'm been charged what iam with nothing on and 2 because its been off so long .

Now since my neighbour has moved out their coming back lower my bills , but when I say I'm using nothing I mean exactly that I don't use my oven now , washer is off at the mains and used twice a wk , aurfyer at night once , kettle about 6 times and I dint let it boil that's to wash pot or brews .

I have a night light on from dusk energy light bulb,  shower is turned of on mains when in use , I have a small infa red fire that goes on at night for warmth for about 1 hr in intervals ...... TV is only on at night and 3 bedrooms are empty as we live downstairs to save and my bills coming back last was 110.00 .

The house alarm isn't working although it never has and I've no idea how to reset from previous but again it's old , my doors have sensors on is that anything to do with it ?? And there's a socket in my frontroom that if I turn it off it cuts the shower of and also some b gas therm switch which is off now . I'll enclose photos 

That's what was in the house when I bought it it was always on but now I've located the switch to turn off which is below at the bottom the one underneath is for the shower so the switch completely shuts it off that with the meter but this one turns the mains to the shower I think but the other switch turns the central heating off ..... sorry all these switches confuse me 

I've not yet done a creep test but I've only been in this house 3 yrs and all my appliances are new apart from the shower it's old .