There is a QUEST sponsership scheme thing . they sponser students and give you summer work placement at civil engineering companies. The number they give out if limited, so yeah you could try that but its not 100% you will get it.
As for your deffered entry, you should have planned your gap year in advance, most of the pre uni placement are taken already e.g ARUP .
I have an interview for Talyor Woodrow coming up for a pre university industry placement. I am very very lucky to actually get this interview. I know they sponser students do their degree course (related to construction) and are part ofo the QUEST scheme.
I applied for work experience for HBG but they haven't replied to me.