Britain's Susie Wolff, the first female driver in 22 years to take part in a Formula One Grand Prix weekend, on Wednesday announced her retirement from motorsport at the end of the year.

The 32-year-old Williams development driver said she accepted her dream of racing in F1 was not going to happen and now wants to help the next generation of women drivers reach the top.

"I dared to be different, I want to inspire others to do the same," she wrote in a blog on the Huffington Post website.

Wolff, whose husband Toto is the Mercedes motorsport director, was appointed Williams development driver in 2012 and last year made a breakthrough when she took part in free practice for the British Grand Prix at Silverstone.

She subsequently also took part in practice at the 2014 German Grand Prix and in Spain and Britain again this season.

No woman has raced in F1 since 1976, and the last before Wolff to take part in a Grand Prix weekend was Italian Giovanna Amati, who failed to qualify with Brabham in 1992.

"I got oh so close," she said Wednesday. "I wanted and fought very hard to make it onto that starting grid, but the events at the start of this year and the current environment in F1 the way it is, it isn't going to happen.

"I can only tell you, I gave it my all. Do I think F1 is ready for a competitive female racing driver that can perform at the highest level? Yes. Do I think it is achievable as a woman? Most definitely.

"Do I think it will happen soon? ­Sadly, no."

Wolff said too few young girls were getting involved in karting and lacked a clear role model, and issues she ­wanted to address with a new initiative to ­celebrate successful women in motor­sport on and off the track.

The annual Race of Champions in London later this month will be her last race.

"It has been a pleasure to work with Susie over the years and see her develop as a driver within the team," said Williams deputy principal Claire Williams.

"Her feedback and knowledge of the car has been an important part of our ­recent development, and we will be sorry to see her go."