"Trickling" or "gas drip" when it's turned off at meter???

Your isolation valve is probably allowing a small amount of gas to get through and one or more of your gas appliances is leaking. Neither of these are OVO's responsibility so I'm not surprised they haven't been much help.

As gas is normally the cheapest way to heat water and cook, even with the price increases over the past few years, I'm not sure turning your gas off and using other heating sources is saving you money.

All we are asking of Ovo is that they actually respond!!!!

Our appliances are all relatively new, the strange amounts being added are random, different amounts, some days nothing, other days all through the night, other days a few separate times a day.

Surely a leak would be constant, as none of the appliances are actually being used most of the time so nothing changes with them.

It's not to save money that we're turning our gas off, it's to stop us having to pay for something we are not using, we're not using other heating sources as we don't need heating at present - it's not cold.

I have no idea what an isolation valve is.

And furthermore, these random charges are appearing when the gas supply is turned off at the meter so if gas is not getting further than the meter it is irrelevant if all of our appliances were leaking as they have no gas being supplied to them anyway!!!!!!!!!

The isolation valve is what you use to turn the gas off. There's no way to turn the meter off so I'm assuming you're turning your gas supply off at the valve on the pipe just before the meter?

Are your meter readings changing... i.e. is the meter registering a flow of gas?

Yes, meter readings are going up. Usage on account is showing gas being used when gas is turned off at what I now know to be the isolation valve. There is no smell of gas. Meter is in an understairs cupboard on so an enclosed space, so I would assume that any leak from the isolation valve would be noticeable by smell. We believe the meter is faulty as these amounts are not consistent. If it was a leak causing it we feel it's unlikely to be quite so intermittent and so different in quantity, is some days there are no"phantom" charges, other days there are numerous, at different times, and different amounts, from 0.02kWh up to around 2kWh in any half hour spell, not connected to any appliance having been used. Ovo are trying to tell us this is normal and is a trickle or a drip, but f it is normal it has only been normal for the last few weeks and never in the last 5 years (which as far back as I've checked).

I should probably mention that the people at Ovo telling us about this trickle or drip are customer service people who reply to Twitter and/or phone calls, so not necessarily people with technical knowledge (though I could, of course, be wrong and they may be qualified gas engineers - though I suspect not)

 It is a smart meter and we are getting half hourly readings.

The readings are making no sense. For example, on 2 consecutive days our actual gas use was identical, (I'm keeping a note of everything we do) apart from an extra boiling of a kettle on the 2nd day, but the total usage according to our meter readings jumped from 4.87kWh on the 1st day to 22.95kWh on the 2nd, with a whole list of extra readings being during the night when no gas was being used (fire off - hadn't been used for many months, hob off, boiler off).  We have sent various screenshots to Ovo, at their request, but have had no response from them. As I said, there are days where there are no strange readings, eg the last 2 days, but then tomorrow there will probably be lots. W

We have requested that the meter is replaced, we know we'll have to pay for it but we're prepared to do that for peace of mind. If they do agree to check it we don't actually trust them enough to expect our money back regardless of the outcome of their checks.

This is a screenshot of the second day. Our only gas usage on that day was 7.00 personal washing & washing up, 9.00 kettle, 12.00 washing up, 2.00 kettle, 4.30 washing up. No cooking or heating on this day. 

Do you have a combi boiler? I'm wondering if you've got a pre-heat setting on the boiler as that could result in similar usage patterns.

If it isn't that then I'm stumped. There are other forum regulars who might have some ideas. Hopefully they'll be along to help.