Update...dog has been treated by vet he has burns to his nose and snout but nothing serious.
No disputes with neighbours,no ex's,no crazies, no feuds.
Thoughts are on the lines of.. mistaken identity, a prank that went wrong, car is with forensics as is the petrol can or should I say what's left of them ..cctv
being reviewed from a number of sources.
Fire services have been amazing never needed them before but they have gone beyond what I had expected. Police are stretched to the limit yet managed to respond within minutes very reassuring.
Thanks for all your replies and suggestions. Now that I am calmer I cannot stress enough the need for security and fire alarms...on yes and a very heroic family pampered pooch!.