Aug 1st. Scotland??? 
it is MUCH cheaper to buy in big bags. When it turns up you then get exercise stacking it properly, chopping it smaller if needed, bringing it in to the house.
firelighters from wilko or poundland, knotted newspaper, kindling, match underneath. You'll need to play with the vents and also which doors to open/shut in the room.
NO new wood, wet wood, no fir/pine, no treated wood (pallets etc) - knackers up your chimney. If you chop your own, get more exercise stacking it in the sun, moving it, restacking it and keep for at least a year to dry fully.
kindling from pound shops, local hardware merchants, B and M, Wilko etc.
expect to do more dusting.
also just to check that your HETAS installer has given you the cert and done the building regs report with the council. And don't forget a sweep at least annually at the end of the burning season.