Bord gais bill!!!

Sounds like you need your boiler serviced!

Shouldn't affect the consumer unless it's done downstream of the meter though?

OP, is it possible there might be other appliance(s) not in your dwelling that might conceivably be connected to your supply?

Edit: Check your meter reading against that stated.

It is also possible that the previous estimate was way too low, and the cost you are seeing is to correct the deficit.

You did not say whether you were in a house, apartment or other multi-unit dwelling, hence my question.

I think this is likely, and prices have soared. As I said above:

If this is the scenario, are they really allowed to charge you the higher rate when the discrepancy arose because of their incorrect estimated bills?

From what I gather you never submit readings, get a hold of a few previous bills, are they all estimated? IS the meter reading reflective of that on the bill? Might your landlord have submitted a larger figure in error, or someone else?! Friends of ours heat their home with underfloor heating and were raving about how cost effective it was for months, until they actually submitted a reading and got hit for a fortune cos they were using a lot more than the estimates. My meters are internal and i generally submit a reading every 2 or 3 months, doesnt take much to do and keeps things accurate.