So I just used the tumble drier for the first time since c. March. We are on the price cap. There wasn't anything heavy in it (aka jeans) but did sheets, t shirts, underwear, socks, pair of joggers, pjs. Took about 75 minutes, cost c. 60p and used c. 1.8kwh. It has a drying sensor on it and is B rated for energy.
I had my heated aired on for about 8/9 hours yesterday for a similar load and it didn't dry everything in that time so to be honest I will probably stick to the tumble 2-3 times a week if I can limit it to that.