UK PlanIt is a national aggregator for current and historical planning information.
You can use it to search for applications and navigate around all the relevant regions and planning authorities.
Currently 427 planning authorities out of a possible 432 (98%) are available. There are details on 13791785 applications and of these 84% can be located on a map.
You can select from this list of authorities with planning data:
The 50 most recent applications on this website
( 5 Dec 2019
)
Show as table