Bransgrove (centre) is a major driving force behind the Rose Bowl

He has underwritten most of the �25m already invested and said he was happy to plough more cash into the venue.

The Rose Bowl was initially turned down for Test status in April.

"We need to know it's going to be taken seriously. We need the reassurance from the England and Wales Cricket Board," Bransgrove told BBC Radio Solent.

"We're talking tens of millions of pounds."

The outcome of the second inspection by the ECB will be known at the end of November.

Since opening in 2001, the Rose Bowl has hosted seven one-day internationals and last year's Twenty20 international against Australia in front of 16,000 fans.

Bransgrove was furious the Rose Bowl was turned down in April as Cardiff, which has yet to redevelop its ground was awarded a 2009 Ashes Test.

He said at the time: "The reason this has really taken us by surprise is that we could not have imagined that Cardiff would get accreditation and we would not.

"They have made us aware of the reasons which, in their view, are that there needs to be more evidence of improvement in the standard of pitches at the Rose Bowl."