This is a Greentom 3-in-1 carrycot and buggy, suitable from birth to ~ 4 years.
We have had it since 2015. It had daily use then for a couple of years, then was not used for three years, then daily use again until earlier this year, when our youngest grew out of it.
The wheels are quite worn, but still get around alright. It has a five-point harness. The brake is okay: not great but it never has been, and its mechanism has recently been cleaned of debris so working a bit better.
It starts off as a pram/carrycot, then can be changed to a buggy where your little one faces you, then can be changed to a buggy where they face away from you. The first two photos show it in the last of these arrangements. The third photo shows the carrycot (deeper when attached), larger child seat (unused), an adapter kit and two covers.
It's made of recycled plastic by Dutch firm Greentom, and the carrycot has an organic cotton & wool mattress with organic cotton cover. We also still have the original instructions.
The final photo is a stock one from the manufacturer showing the three different arrangements of this model.
Taker would need to collect from Hartington Road, Brighton.