On 25 March we have been informed by the UK Government that:
The Bachelier Finance Society has been approved by the Commissioners for HM Revenue and Customs under Section 344 of the Income Tax (Earnings and Pensions).
The organisation’s name will appear in the list of approved bodies on Gov.UK. There may be a short delay before HMRC staff receive notification of the organisation’s approved status.
UK members can deduct their membership subscriptions now.