More than 4,000 pest technicians are now signed up to the register, which has grown by more than 15 per cent since 2014.

But Stephen Jacob, chief executive, insists the growth of the organisation will not affect an important philosophy.

He said: “BASIS PROMPT has attracted a significant number of new members in a short period of time.

“But we’re not providing the service to make profit and every bit of money we receive from membership fees is used to deliver extra benefits, such as the mobile app we launched last year.

“The digitalisation of certificates for 2017 will reduce our administration costs and that means we can keep fees for next year the same as they’ve been for a decade.”

Fees will remain at £25 + VAT for members of the BPCA, NPTA or local authority controllers and £30 + VAT for non-affiliated technicians.