You gotta love this one ... the English socialite who claimed she had a 3-some with Mel B and Stephen Belafonte was put off when paparazzi asked her about it ... at a restaurant she clearly knew was riddled with the paps.

Lady Victoria Hervey sauntered out of Catch restaurant in WeHo Friday night when photogs asked about her claim, as well as claims by Mel B's former nanny that she had 7 years worth of 3-somes.

Hervey seems put out, even surprised, leaving one of 5 restaurants in L.A. everyone knows has a gaggle of paps outside.

We love Hollywood ... and clearly so do the Brits.