The British Powerlifting qualifying totals for national events can be found here.
Qualifying totals for the EPA can be found here.
Below are an article from Former Steelmen Coach and IPF referee Barrie Nelson, discussing how to achieve your best total at a competition (Better Competitor) and a document discussing the basics of what happens on competition day, as well as generalities on how the lifts are refereed (Competition Day).
If you have any specific technical questions that aren’t detailed in the Competition Day document or aren’t clear in the IPF rules, please contact the YNEPF Technical Officer Carole Springett.