A couple of my old-aged family members are scheduled to travel on May/26th from India-LHR-USA. They require wheel chair assistance to/from the aircraft (and during transit in LHR). Currently their flights are not cancelled, according to BA.com

Does anyone know if wheelchair assistance will be available during the strike period? Should I be worried about them getting stranded in LHR (i.e, what are the odds of the connecting flight from LHR getting cancelled after they start their journey)?