Internet Of Things / IoT / Connected Home / Smart Houses

The room I worry about is my daughter's room, it's the last rad on the circuit and can be noticeably colder

What type of rads do you have?

Modern alu rads have low water content... pretty much meaning it takes less water to heat the rad, resulting in faster heating throughout the house with the speed being how fast you can convey the hot water to the rads, rather than how fast the rads can push it to the edge to radiate.

Radiators like this: https://www.theradiatorcompany.co.uk/product-pages/sectional-aluminium/vox/ are ridiculously efficient and fast, and even manage to act as air pumps to the heat by directing it into the primary space.

The room I worry about is my daughter's room, it's the last rad on the circuit and can be noticeably colder.

You need to balance your radiators. Close the lockshield a bit on the ones that are warming up quickly and open it up on the ones that don't. Takes hours to do it properly. Some people like to measure the input and output temperature of each radiator with a thermocouple while doing it. Heating engineers will never do it properly because it takes far to long for anyone to want to pay for their time to mostly drink a lot of tea.