Warr has previously been a front-runner in sprints and pick-up truck racing but the Clio Cup represents a major step up for him.
Each of its races take place at the British Touring Car Championship’s high profile events and much of the action is shown live on ITV4.
Warr, aged 46 from Surbury, commented: “We were looking around for the best one-make racing category and there’s nothing to match the Clio Cup.
“The organisation and exposure are excellent but it’s a lot more than that – we are only a small outfit so cost, reliability, technical support from the championship and knowing that all the cars are equal are really important things.”
He added: “I’ve never driven Donington before so the weekend is going to be about establishing a base point to work from for the rest of the season.
“I’ve had a couple of days in the car – one with former Champion Phil Glew sitting alongside me which proved really productive in how much faster I was at the end of the day.”
Renault Sport’s UK Motorsport Championship Manager Will Fewkes said: “It’s great to see a small team from the club level racing scene choosing the Clio Cup to further their future ambitions.
“It is yet more evidence of just how much the Clio Cup stands out in single-make racing in terms of return on investment and being able to compete on an equal footing. We very much welcome Luke and BLG onto the grid and wish them every success.”