England could face Wales six times in the space of 18 months - as the countries are poised to agree terms for a one-off Test at Twickenham, at the end of next season.

Sportsmail has learned that the RFU and their counterparts at the Welsh Rugby Union have been in talks about staging another lucrative fixture in south west London.

The neighbouring nations have long been the best of oval-ball enemies, but the appetite for this cross-border rivalry remains as healthy as ever - and it is understood that negotiations are close to being finalised.

Head coach Eddie Jones is likely to take charge of England to play Wales at Twickenham

If ratified, the match would take place instead of the traditional England-Barbarians game every June - as it did in 2016, when Eddie Jones's side used an encounter with Wales as a means of preparing for their three-Test tour of Australia, which yielded an historic 3-0 whitewash of the Wallabies.

Next June, the fixture would occur before England return to Japan - where this year's World Cup is being held - and Wales travel to New Zealand.

Back in February of this year, a Welsh victory over their Red Rose rivals propelled them towards another Grand Slam. Next month, the teams will face each other home and away, with Wales aiming to extend a formidable, national-record run of 14 consecutive Test victories.

This proposed match would be the sixth meeting in 18 months between England and Wales

They could meet again in the quarter-finals of the World Cup - if not later in the tournament - before another showdown in next year's Six Nations and the proposed June clash a few months later.

By that time, Wayne Pivac will have replaced compatriot Warren Gatland as another Kiwi head coach of Wales, while Jones is likely to still be in his post, providing England have avoided a calamitous, early World Cup exit.

A meeting between the sides would be expected to fill Twickenham, generating millions for the financially-embattled RFU, while also earning a substantial, seven-figure sum for the WRU.

Wayne Pivac will be in charge of Wales when they play England at Twickenham

Meanwhile, England's World Cup warm-up matches next month are due to be watched by bumper crowds.

The Cardiff game against Wales is already a sell-out, while the reverse fixture six days earlier at Twickenham only has hospitality tickets left available, as is the case for England's encounter with Ireland on August 24.

Eighty per cent of tickets have now sold for the final, pre-tournament match against Italy, so that September 6 game at St James' Park, Newcastle is on course to take place in front of a 52,000 capacity attendance, at the iconic football arena.