I’m just on the way to LHR and have had an email from BA about cancellation of my flight - BA596 to VCE in CE. Fortunately they were able to get us into the last flight of the day an hour later, but in ET. Does the downgrade mean that fast track security / lounge access are now removed or would I be able to use my existing boarding pass for those purposes?

Not too bothered about compensation right now, but as its likely that it will be a) a fight to get anything refunded and b) probably not the whole difference between classes (it’s a 241 Avios booking) it would be nice to have some of the benefits - thanks in advance for any advice.