Gambling Commission statistics show GGY fell to £14.3bn ($17.63bn) in the year ending September 2019, compared to the period between April 2018 and March 2019.
However, online gaming rose by 4%, with online casino generating GGY of £3.2bn, mostly from slot games, and betting contributing £2.1bn.
Football wagering accounted for 47% of the overall betting amount, with horseracing betting rising 11% and virtuals 8%.
National Lottery was the second-largest sector in terms of GGY, increasing 4% to £3.2bn, with contributions to good causes rising by 7% to £1.6bn.
Land-based activity fell, however, decreasing 14% to £2.8bn as off-course and pool betting declined.
A primary factor here was the regulation which came into force in April 2019, limiting the maximum stake on fixed-odds betting terminals (FOTBs) to £2, previously £100.
As a result, GGY for B2 machines – FOBTs – fell 46% to £624m. This also led to the total number of betting shops decreasing to 7,315 in September 2019, down 12% from six months earlier.
The number of licensed gambling premises also decreased in the same six-month period, falling 10% to 9,745.
The amount of licensed operators fell by 36 to 2,652, from March to September 2019, while the number of employees in the gambling industry was down 4% to 98,174.
