The rules of play for Pompey Pool League are the “Official UK 8 Ball Pool Rules” published by the United Kingdom Pool Federation 1992 with paragraph 4(e) changed to read “If no ball is pocketed from a legal break, then the player who breaks must clearly nominate his/her choice before play continues.  Failure to do so will have the penalty of a foul.”

These rules are no longer available on the Web, so they have been transcribed, here.
For Winter 2018, Refereeing and Breaking will be alternate Refereeing and Breaking as Summer 2018 and this will be applied to all League Matches, Cup and Shield Competitions and Singles and Doubles. This is bring consistency throughout all matches. The only exception to this will be the final game of a match played on a neutral table, where the final break will be decided by the toss of a coin.

Black Ball Combination Shot clarification, here.

Doubles Rules (29th May 2016), here.

Pompey Pool League Constitution (5th September 2018), here.

League Rules (1st October 2018), here.

Additional Player Sign on Form (Winter 2018), here.