England and Wales Cricket Board (ECB) chief executive Tom Harrison is "very confident" of this year's Ashes series going ahead in Australia.

Joe Root's England side are due to start their bid to regain the urn at The Gabba on December 8, with the fifth and final Test scheduled to begin at Optus Stadium in Perth on January 18.

However, England players have raised concerns about the possibility of their families not being able to join them for the trip due to Australia's tight border controls during the coronavirus pandemic, as well as the prospect of lengthy quarantines.

Multi-format players such as Ben Stokes and Jos Buttler face the prospect of four months away from home as the T20 World Cup takes place in the United Arab Emirates and Oman ahead of the Ashes. 

Talks between the ECB and Cricket Australia are ongoing to reach a compromise and Harrison is optimistic that a full-strength England party will make the trip.

"We are working very closely with Cricket Australia (CA) and I had my latest conversation with my counterpart at CA yesterday," Harrison said. "We are speaking every few days on the matter.

"All the right conversations are happening at government level in Australia and we will be using our own diplomatic channels in the UK to ensure the view of the players and the ECB [is heard].

"This is not players asking for anything unreasonable – these are very reasonable requests that we are asking the Australian government to give some leniency, frankly.

"It's going to be important for us to ensure we can give comfort to players that their families are going to be able to be in Australia and that those conditions in which they are quarantined will be reasonable, enabling the players to be at their best in that Test series.

"It's a conversation that's going to take place over the next few weeks but I am very confident we will get to a place where we can fulfil our obligations to tour."