[Bonnyboy]

Clean down the backs of radiators and down the middle of double radiators to help airflow. Apparently you can buy special brushes but I just tape on some sponge to the end of a garden cane

Read that putting tinfoil behind a radiator to reflect heat back into the room could save around the £20 per year ( dunno how they calculated that fig. Can‘t see it being per radiator) It seems a bit of a faff. Might do it as I work my way round the house decorating.