I don't think anyone is bothered really about the environment.I agree that there would have been more than 1 person, not sure how many, but you'd think that the govt could just have mentioned it!
I look forward to Truss lecturing about environmental concerns though - bit harder for the govt to argue that this wasn't as 'green'.
Look at PMQ's, that is a half an hour shouting match which no-one cares about but most MP's attend it. That's over 600+ MP's being bussed in every week at whatever it costs price and god knows how much it contributes.