As above, rather than get to Wickes and look stupid, thought I’d ask on here, will a wheelbarrow fit in the back do you guys know?

Will your 1000l boot hold a 85l wheelbarrow? I haven't tried but I'd guess so, especially if you're putting the seats down. Had a fridge freezer (just about) in there the other day, so I think it should be fine.

Length 148cm x Width 58cm x Height 56cm

it'll fit with the seat up

If you mean will a Wickes wheel barrow fit in you FF, yes it will. I wouldn't bother buying one though if you want it to last.
I bought one and it has rusted completely and has nearly fallen apart. Next time it goes in my car it will be going to the tip.
Absolute rubbish.
Meanwhile my other barrow purchased from a builders merchant, which is older, goes on and on, even when stored outside.

Get a builders green barrow from the merchants, TP have a selection, haemerlin make decent barrows but on my site none of them last more than about a month no matter where I get them from!! There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
Fiat 500x 1.4 multiair Lounge 2015
2010 LR D4 Commercial 2.7 TDV6