Defending British Touring Car champion Andrew Jordan will race at Snetterton having been cleared to compete following his practice crash on Saturday.
Jordan suffered mild concussion in the opening practice session after going off at Riches, causing damage to the rear and roof of his Eurotech Honda Civic.
He then skipped practice two after going to hospital for precautionary checks.
The 25-year-old was ruled out of qualifying following further assessment from the championship's medical team, but has been given the all-clear to compete on Sunday and will start the opening race from 31st.
"The shunt wasn't that big but it rattled my head round a bit," Jordan told AUTOSPORT. "I wanted to qualify. But when I got out of the car and I didn't know some pretty obvious stuff, the doctor made his mind up that I couldn't take part.
"I am annoyed at myself about it, I've made a big dent in our championship.
"I need to look at a race three result really. If I can get into the top 15 in race one it would be a good job but it's about the long game today.
"Going forward there's nothing to lose now though, it's maximum attack. I need to go for it now."
Jordan is third in the championship standings, 28 points behind leader Colin Turkington, who will start second alongside poleman Jason Plato.