Hi Goodnbad,
An increase in bills is always concerning, and a lot of things can factor into a gas bill increase. I would recommend you check your meter reading and compare it against the End Read on your invoice to check that the bill is inline with your usage.
I would also recommend looking at what gas appliances you have in the property as things like hot water systems, and heaters will causing a spike in the winter months.
Thank you.
Best Regards
Ellen
