May 11 (GMM) A lack of official information has triggered speculation about Ross Brawn's health.

And another rumour is that his absence in Barcelona could be connected with Mercedes' billion-dollar dispute with Bernie Ecclestone over the next Concorde Agreement.

The German squad announced on Thursday that Bob Bell is leading the team in Barcelona because regular boss Brawn is back in Britain on doctor's orders.

Bild newspaper said the 57-year-old was given the advice in hospital earlier this week, following a dizzy spell at his home in England.

"It's more than the flu," chief executive Nick Fry is quoted as saying, "but I can assure you that it's nothing life threatening."

Indeed, a spokeswoman told us on Thursday that Brawn will be back to work at Monaco in a fortnight.

For Spain, Brawn will watch the action on television.

"We will still keep in touch," Michael Schumacher revealed. "Ross cannot be replaced. That's simply impossible."

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