Permira is thought to be preparing a £1bn hostile takeover bid of soft drinks supplier Britvic.    Chances of a friendly takeover were described as “laughable” this week by a source close to Britvic, which closed on Friday at 355p, valuing the company at £766m.   Permira is thought to have held secret talks with PepsiCo, which owns 5% of Britvic.   Although Britvic issued several profits warnings last year, recent trading has been good/   The Mail on Sunday 13/5/07 page 1 (Financial)