Thanks, JimC, for 'graffitti' and 'grim'. Two more:
"Control speed governing toboggan's turn" = 'regulate'. I've used 'rule' and 'g' for 'govern' but still can't see what's happening here...
"Yarmulke loads brought back to cover posh students" = 'skullcap'. Just checking I've done this right: 'loads' = 'packs', 'students' = 'll' and 'posh' = 'u' (as in U and non-U? Never did understand that...)