Williams will not run in first day of testing in Barcelona

The opening day of testing is set to start on Monday at the Circuit de Catalunya, but the British team have now confirmed to have run out of time to complete its FW42.

"Unfortunately, we have had to delay the start of our pre-season Barcelona test to Tuesday morning," Claire Williams said. "We have had an incredibly busy winter at Grove getting the FW42 prepared for the season ahead and, despite everyone's best efforts, we need some more time before it will be ready to run.

"Our absolute priority is to always ensure we bring a car to the track that is the best that it can be and sometimes that takes longer than you'd anticipate or like. It's clearly not ideal, but equally it's not the end of the world.

"We will obviously have our work cut out to recover the time lost but we still have seven days of testing left and we will be maximising that time to prepare the car for the first race."

Williams will have a brand-new driver line-up in 2019, with Robert Kubica and George Russell competing for the former world champions.