London - Williams will miss the first day of Formula One's pre-season testing in Spain on Monday because the team has yet to finish working on its new car, it announced on Sunday.
The delays had already forced the British team, last overall in 2018 with one of the worst-handling cars it has ever built, to cancel a filming day at Barcelona's Circuit de Catalunya on Saturday.
"Unfortunately, we have had to delay the start of our pre-season Barcelona test to Tuesday morning," deputy principal Claire Williams said in a statement.
"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."