looks like there has been one fitted previously due to the set belt so should fit. just be careful not sure of ins and outs or how strongly it would be enforced but i believe it is technically illegal to have a dog on front seats,
SmartDriving
According to that its not illegal but you could be done if anyone felt an in restrained dog contributed to any accident .
im on the bus at the moment
Oh and I've got a truck cab too so unless you're dogs quite small I wouldn't put him in the middle lol that will be very tight. You may also find that the half decent seatbelt adapters for a harness are more designed for working with a 3 point belt, not a lap belt. I'll take a pic of mine later, im on the bus at the moment
Does it smell of wee? Are the seats designed for the vertically challenged?
Is it full of recently-released convicts / old people who smell of wee?