All players are expected to obey the Laws of Duplicate Contract Bridge promulgated by the English Bridge Union and to observe the ethics of the game set out in the handbook of EBU Directives & Permitted Conventions (Blue Book).  

Players unfamiliar with the Blue Book should note that it restricts only agreements between partners. (Psychic or other irregular bids, or unusual plays, are legitimate ploys as long as they contain the same element of surprise for partner as for the opponents.)

Permitted Conventions: Claygate Bridge Club permits Level 3 agreements between partners, as described in the EBU Blue Book. 

See https://www.ebu.co.uk/documents/laws-and-ethics/blue-book/blue-book-2019.pdf

A Director, even if playing, should be called when a problem of any sort occurs.