Ashton in Makerfield is what we always called it and so did everywhere I know of. So why is it now suddenly called just Makerfield?

Didn't there used to be a trolley-bus service from St Helens (by the old open market hall) to Atherton which I assume was in Makerfield?

The constituency isn't only Ashton.

https://en.wikipedia.org/wiki/Makerfield_(constituency)

Now I remember. The trolley-bus service to Atherton was number 1. The Dentons Green to St Helens Junction service was number 6