Old Scalextric & Hornby Railway set (Morden SM4)

Have a mixed box of Hornby railway, a scalextric set plus another German narrow tracked slot car system. They haven't been used for many years and are a bit dusty as have been stored in the loft. Not sure what still works, but some track, trains/cars or transformers are probably fine. Appreciate probably don't really go together, but would like to get rid of all 3 in one go.