The 19 MPs who have signed the letter warn: "We do not believe there has been sufficient parliamentary scrutiny of this policy and neither has there been a sufficient level of transparency around the results of the Gambling Commission’s pilot of these checks.
"The pilot of affordability checks involving credit reference agencies has proved that the checks cannot be frictionless for racing bettors. The commission, however, seems intent on pursuing this damaging policy despite both the current and former gambling ministers promising that affordability checks would be introduced only if ‘fully frictionless’."
The MPs add: "We ask that you urgently intervene to reconsider this policy which was introduced by the previous government in its 2023 Gambling White Paper. The betting landscape has changed significantly since then with a booming illegal market fuelled by increased regulation and taxation on the licensed betting sector.
"Growing numbers of people are already choosing to bet illegally rather than be subjected to intrusive checks more appropriate for securing a mortgage than engaging in a legal pastime enjoyed by millions of Britons."