TMZ has learned disso queen Laura Wasser paid a secret visit at the UCLA psych ward last Tuesday, and the family wants Laura back as Brit's custody attorney.

Wasser, who repped Brit in the divorce, quit the case -- we're told because Britney wouldn't listen to her. But sources say Jamie and Lynne want her back.

TMZ knows Jamie wants to 86 Trope and Trope as Brit's reps, in part because they have been chummy with Sam Lutfi. People at UCLA say Britney "lit up" when she saw Wasser. But there's a hitch -- we're told the deal will be sealed ONLY if Britney doesn't fight the conservatorship. As of Tuesday, she was fine letting Jamie call the shots, but it looks like that's changed.

If Brit accepts the conservatorship and Jamie is at the reins, Laura Wasser could be back in the Britney business.