Gas safety record
Gas Safety (Installation and Use) Regulations 1998, reg 36 and reg 36A
Twelve months from the date of the check, and there is no grace period — the day it lapses, it has lapsed.
Indate holds the check date and the deadline date as two separate things, because reg 36A only keeps your anniversary if the check falls within two months of the deadline. Inspect earlier than that and the deadline moves to twelve months from the check, for good. Do it three years running and you have quietly given away weeks you won’t get back. Indate says which of the two just happened, the moment you enter the date.
The copy goes to an existing tenant within 28 days, and to a new tenant before they move in. Breach carries an unlimited fine and possible imprisonment.