Small daily charges are part of your tariff, they are the standing charges. 

Yeah I'm aware of those. The charge goes on at midnight and is 27p when the gas was off and only electric was being used. I've not checked what it is when the gas got turned back on but when I used to come in from work at 7am when the gas was off it was 31p now that the pilot has been lit for the winter it shows 37p when I get in at 7am for the electricity and the gas pilot running. After posting the above it jumped back down from the £1.12 that I reported to 77p so I'm not sure what's up.

I'm finding the usage display thingy not acurate and I'm tempted to just switch it off.

Thanks for taking the time to reply

Hi Sinky I agree the IHD does display very small costs but not reliably, it is really supposed to be useful to remind you of heavy costs like fires and tumble driers. 

Check the gas meter readings to monitor your usage.  You may well have developed a slow gas leak somewhere.  Better to find it now than later when you're faced with a big bill for all the wasted gas!

Thanks for the reply guys. I came in from work this morning and the readings were back to what I normally expect so maybe the usage display thingy was just playing up.