Mostly orange flame and strange petrol smell from oven

Good Afternoon all.
Not quite sure what the issue is today with the Gas supply, and I can assure you there is no problem with the oven (It was perfectly fine yesterday and has been for months), but today, there seems to be a lot more yellow/orange flame than blue, and a strange almost Petrol-like smell to the Gas. (See attached image - I couldn’t upload the small video I took)
Oven has cooked food perfectly still, but the smell of the gas has made me feel a little dizzy.
I seem to recall this happening a couple of times last year also.
Could an OVO Tech have a look at this, and maybe explain if there is a problem with the gas supply in the HP19 (Aylesbury) area?
Many Thanks.
