The Ospreys wing, who has scored a Welsh record 45 tries in 62 Tests, missed last weekend's victory over England due to an ankle injury.

But Williams is now back in training ahead of the appointment with France next Friday night.

Wales head coach Warren Gatland plans to name his team on Monday, with Mark Jones likely to make way for Williams' anticipated return in Paris.

Williams was hurt during Wales' tournament-opening win against Scotland 12 days ago, limping off late in the second half.

"All last week I had been optimistic about passing my fitness test and playing, but I was probably fooling myself," he said.

"I had been wearing a cast boot, so thought I would be okay, but as soon as I started running I knew I had no chance.

"Even if it had been the World Cup final I couldn't have gritted my teeth and played.

"Maybe if I was a prop-forward, but in my position I put a lot of pressure on my ankle, so there was no way I could play against England.

"Now, however, I can report that I am back in training, and while it is still a bit sore, I should be fine for the France game," wrote Williams.

He admitted it was "a horrible experience" to watch the England clash, rather than play in it.

"It was a strange feeling last Saturday night. It is not often you beat England and don't feel completely euphoric," added Williams.

"We weren't as happy as we expected to be because deep down we knew we could play a lot better.

"Then again, there was also a good deal of quiet satisfaction in knowing that we can win without playing at our absolute best.

"I can tell you though, that it was a horrible experience watching from the sidelines. The game felt like the longest 80 minutes of my life.

"England had a good game-plan, they defended well and were very physical.

"But although there were a few nerve-wracking moments, I felt we were comfortable throughout the game and we kept good possession. I was never too worried about England getting in front."