Getting filled in from 11/01/2021 access holes easy to get into main grids, and two round man hole lids one on the prom side one on chapel street side of the roadMight be worth a nosey for someone in Blackpool. Complete with access details.
IN PICTURES: The abandoned subway under Blackpool Promenade
Blackpool Promenade will partially close for ten weeks starting Monday while a long-abandoned subway running under the road is filled in.www.blackpoolgazette.co.uk