Machines also banned from playing positive-sounding noises when the player has actually lost money
Online casinos will be forced to overhaul slot machine games to slow them down and remove features that cause players to lose track of how much they are spending.
In a series of curbs likely to reduce the industry’s £2.2bn a year revenue from online slot machines, the Gambling Commission has told UK companies to slow them down, with a gap of at least 2.5 seconds between spins.