What temperature are people's houses at the moment and do you still have the heating on?
My thermostat used to be set at 20c, but have been trying to get away with 17-18c , the last few weeks.
This still requires the heating on a couple of times a day at the moment. Spent £6.80 on gas this month which includes a bit for hot water through the Combi boiler.
Currently 17.8c in the house. Seems to sustain at this temperature around the middle of the day with a couple of people around the house, no heating and outside temps of 11-15c, just the evenings and mornings that heating is required at present. With any luck some warmer weather in the next few days will reduce gas usage further.