UK high street bookmakers saw their shares dive on Thursday on word that parliamentarians were pushing for further restrictions on fixed-odds betting terminals (FOBT).

On Thursday, the all-party parliamentary group (APPG) on FOBTs called on the government to reduce the maximum betting stake on FOBTs to £2 from its current £100. The government is currently conducting a review of FOBT activity, including whether to reduce the current cap of four FOBTs per betting shop.

Labor MP Carolyn Harris (pictured), who chairs the APPG, urged the government to “properly regulate FOBTs and to do so with immediate effect.” Harris claimed that the maximum stake reduction should “at the very least” be done “on a precautionary basis.”

The £2 max stake has long been a goal of anti-gambling campaigners, but the government rejected a stake reduction in 2015 after the industry agreed to require FOBT wagers over £50 to be placed with betting shop staff rather than via the machines.