Statistics from the Gambling Commission’s annual report show the slight decrease was replicated in the remote sector, where GGY fell 0.6% to £5.3bn.
This fall was heavier in land-based casinos within Great Britain, which generated £1.1bn in revenue, a 10% drop.
But there were increases for the online slots category, which generated £2.1bn in GGY for the period (6% up).
Gaming machines also made £2.8bn in the final trading period before the implementation of the £2 stake limit on fixed-odds betting terminals (FOBT); the limit was previously £100.
This represented a 0.5% increase, although it was generated primarily by B3 gaming machines, which made £1.1bn – a 91% growth.
Category B2 machines, which include FOBTs, generated £1.2bn, a 31% fall.
Elsewhere, there was a 3% drop in the total number of gaming premises in Great Britain (to 10,761) as well as a 6% decrease in the total number of employees within the industry (102,782).