Alex Lynn says he struggles to 'put into words' the thrill of getting a run in an F1 car again after making his on track debut in Williams colours at the Circuit de Catalunya.

The reigning GP3 Series champion, who celebrated his maiden GP2 Series win at the same venue over the weekend, was given his first outing in the Williams FW37 since becoming the team's development driver over the winter.

Despite a fairly limited day of running as he completed 52 laps - well down on Pascal Wehrlein's 137 lap total -, Lynn was nonetheless delighted with the experience and full of praise for the car.

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"It was a really special day, really pleased with how it went, managed to get through the whole programme as we would have liked, and also got a really nice feeling for the car - very positive."

"It was a really lovely experience, such a well-made car, it's hard to put it into words really. It's very rare you get to drive something like that. It took me quite a long time to really feel comfortable with the car because it is very, very different to anything I've ever driven.

"I'd say it was only in the last few runs I feel I was really on top of it, and I didn't get that many laps in so it was always going to be a little bit limited."

A former Red Bull junior, Lynn's first GP2 Series win came in only his second weekend of GP2 Series racing with the DAMS team