England head coach Chris Silverwood has tested positive for COVID-19 during his team's dismal Ashes tour.

The England and Wales Cricket Board (ECB) confirmed Silverwood, who was already due to miss the fourth Test, had joined the number of positive cases in and around the team camp.

It emerged after the Melbourne Boxing Day Test that a member of Silverwood's family had tested positive.

That set up the possibility that Silverwood himself may have come into sufficiently close contact to be infected.

Silverwood was forced to isolate, ruling him out of the Sydney Cricket Ground clash with Australia, which begins Down Under on Wednesday. Now, a positive test means he must wait to rejoin the team.

England are expecting him to be available again to take the reins for the series closer in Hobart, starting on January 14. In the meantime, batting coach Graham Thorpe is stepping up to direct team operations.

In a widely reported statement, the ECB said: "England men's head coach Chris Silverwood has tested positive for COVID-19.

"Silverwood has been isolating in Melbourne since December 30 following a positive test from one of his family members. He will remain in isolation until January 8.

"Silverwood is asymptomatic and is fully vaccinated. He is expected to return to the England party in Hobart ahead of the fifth Ashes Test."

The news comes after England great Graham Gooch expressed dismay at England's inability to be competitive in Australia.

They have already lost the series, after suffering heavy defeats in Brisbane, Adelaide and Melbourne, with Silverwood's position coming under scrutiny.

Speaking to Stats Perform, former captain and opener Gooch said: "I'm bitterly disappointed because losing a Test match is one thing, losing a series is one thing.

"But, what's really concerning for me is the lack of competitiveness of our team against Australia not only in the match at Melbourne, but in the previous two matches. 

"They've outplayed us, out-batted, out-bowled and out-fielded us in all three Tests, in most of the sessions.

"We've had a couple of half sessions, which we've done well with Joe Root and Dawid Malan scoring a few runs, Jimmy Anderson bowling a brilliant spell to help England dismiss Australia at the MCG for 267. But apart from that, we've been lacking."