Information

How your bill is calculated:

Subtract your previous meter reading from your current meter reading to work out the volume of gas used. If you have an imperial meter that measures your gas in cubic feet multiply this number by 2.8317 to convert to cubic metres. If you have a metric meter there's no need to do this.

Then multiply this number by the Calorific Value and the Correction Factor, and then divide by 3.6 to give you the total Kilowatts used on your bill.

Multiply the total kilowatts by your unit price.

CCL is charged the same way by multiplying the kilowatts by the CCL which is a government tax on Industrial & Commercial supplies (reductions may be applicable)

VAT will be added after these calculations have been made for your total amount due.

Meter types and Invoice definitions detailed below:

Meter Unit Conversion Factor:
MCUF	Thousands of cubic feet = 28.317
HCUF	Hundreds of cubic feet = 2.8317
TCUF	Tens of cubic feet = 0.28317
OCUF	One cubic foot = 0.028317
HM3	Hundreds of cubic metres = 100
TM3	Tens of cubic metres = 10
NM3	Tenths of cubic metres = 0.1

Invoice Definitions:
A	Actual reading taken by the data collector or agents working on its behalf.
E	Estimate
C	Customer
S	Start = when 2 suppliers agree on a reading when supply is or has been transferred.
KWH	Kilowatt Hours = energy consumed
CCL	Government energy tax on Industrial & commercial consumption (reductions may be applicable)
MPR	Meter Point Reference, a unique number that identifies the specific point of entry of the gas supply.
CF	A fixed meter specific factor applied to take into account the effect of temperature and pressure on actual gas flow. 1.02264
CV	This represents the amount of heat or energy in a given volume of gas. An average calorific value is calculated monthly by the transporter. 37.5 - 43.0

Gas Emergency.

SMELL GAS/EMERGENCY, call the National Grid’s 24-Hour emergency number on 0800 111 999

Never:
Smoke or use any kind of naked flame.
Operate electrical switches, on or off.

Always:
Ventilate the area by opening doors and windows.
Turn off gas supply at its source.
Check and turn off gas appliances.
Report to National Grid asap 0800 111 999
Report to Simple Gas asap 0121 374 2710