Which LDZ / Local Distribution Zone you are in has a significant effect on your gas bill. This applies to both the standing charges and the unit rates or price per therm. Unfortunately, it’s also something you can’t change, short of moving your business. Your LDZ also dictates who you will need to contact to upgrade or downgrade your supply or if you are looking for a new supply.
The NO area covers the following Postcodes

Towns
Alnwick |
Alston |
Appleby-in-Westmorland |
Ashington |
Barnard Castle |
Beckermet |
Bedlington |
Belford |
Berwick-upon-Tweed |
Billingham |
Bishop Auckland |
Blaydon |
Blyth |
Boldon Colliery |
Brampton |
Carlisle |
Catterick Garrison |
Chester Le Street |
Choppington |
Cleator |
Cleator Moor |
Cockermouth |
Consett |
Corbridge |
Cramlington |
Crook |
Darlington |
Durham |
East Boldon |
Egremont |
Ferryhill |
Frizington |
Gateshead |
Guisborough |
Haltwhistle |
Hartlepool |
Hebburn |
Hexham |
Holmrook |
Houghton Le Spring |
Jarrow |
Keswick |
Kirkby Stephen |
Leyburn |
Maryport |
Middlesbrough |
Moor Row |
Morpeth |
Newbiggin-by-the-Sea |
Newcastle Upon Tyne |
Newton Aycliffe |
North Shields |
Northallerton |
Penrith |
Peterlee |
Prudhoe |
Ravenglass |
Redcar |
Richmond |
Riding Mill |
Rowlands Gill |
Ryton |
Saint Bees |
Saltburn-by-the-Sea |
Seaham |
Seahouses |
Seascale |
Shildon |
South Shields |
Spennymoor |
Stanley |
Stocksfield |
Stockton-on-Tees |
Sunderland |
Trimdon Station |
Wallsend |
Washington |
Whitehaven |
Whitley Bay |
Wigton |
Wingate |
Wooler |
Workington |
Wylam |
Yarm |
Counties
Northumberland |
Westmorland |
Cumbria |
County Durham |
Cumberland |
North Yorkshire |
The NO Distribution Zone is operated by Northern Gas Networks Ltd