By Richard SimpsonThey are married, but not to each other. So it's a little surprising to see Ultimo boss Michelle Mone and actor Shane Richie walking along arm in arm. But there is apparently a simple, and innocent, explanation - Richie is 'tactile'. That's what a spokesman for the EastEnders actor said last night when asked about the pair's cosy stroll in London's Soho. Keeping close: Michelle Mone and Shane Richie take a stroll in Soho on Wednesday night Richie, 46, and Mrs Mone, 38, hugged and clasped hands as they left the Hix restaurant and then linked arms as they made their way with friends to a karaoke bar, where they partied until 1am. Lingerie tycoon Mrs Mone met Richie during the filming of new ITV show 71 Degrees North,...