The British thoroughbred industry will come to a standstill on Wednesday in protest over a government review that proposes to increase betting taxes.

Jockeys, trainers and racecourses will unite in a day-long stoppage as the British government consults on the consolidation of three separate remote betting taxes.

The racing industry says the move would raise taxes from 15 per cent to 21 per cent, costing it upwards of 330 million pounds and putting thousands of jobs at risk.

Betting operators are concerned any harmonisation will raise tax rates to align with higher ones applied to online casinos, damaging sports such as racing that have a lower rate.

The British Horseracing Authority says betting operators could seek to offset tax rises through cost-cutting measures and gravitate towards casino-type products, which are cheaper and more profitable to operate.