Dead fox under parked vehicle in front of 53 Lewin Terrace

Sister had gone outside for a smoke, spotted something go under parked car, turned out to be severely weakened or injured fox under the parked vehicle. Tried to call RSPCA, not within working hours. Searched online to see who to call & was advised to call 24/7 vet, found one local in Staines & called them, they said to bring the fox to them but cautiously. Found a thick large blanket & got ready to pick up the fox & take it to the vet but when stepping outside, saw it was not breathing or moving, used a broom to see if it was alive but no movement or reaction, looked closer with phone flashlight and saw eyes closed, mouth ajar with tongue flopped out to floor & no movement.