Just received this email from BA
Dear Customer,
We’re looking forward to welcoming you on board your upcoming flight to Cape Town on 06 November 2020.
Unfortunately, due to the UK Government's national restrictions, we’ve had to temporarily close all lounges at London Heathrow. Please rest assured that our airport teams are on hand to support you should you require any assistance.
For the latest information on coronavirus, including answers to frequently asked questions, please go to www.ba.com/coronavirus.
Thank you for your understanding. We hope you have a pleasant flight.
British Airways