BarraBoy81: Maybe I am missing something big here?
You're quite right to flag up something that doesn't look right and if more people did that there would be less problems with unmaneagable bills.
I don't think the 112/day is any more right than the 0 per day for 105 days. There may well be a reading, estimating or billing issue but I think you are relying on the statistical information provided when you should be relying only on the accuracy of the meter reading(s) recorded on each quarterly bill or statement. You say you have (currently switched off) storage heaters. I take it you have an Economy 7 or other form of off-peak supply in which case you should have two meters or dials to read. The statistical information you quote doesn't distinguish between full rate and economy units. Frankly it's useless.
You need to go back over this thread. Several times the importance of the actual meter readings has been stressed.
That may be the something big you are missing.
We are not saying you are wrong to be concerned, only that the "facts" presented don't support any conclusion. What we need are the meter reading numbers (whether actual, customer or estimated) and dates on the last few statements and an indication whether the account had an increasing debit balance or not.