So it seems Lindsay and Sam Ronson are back together again. If only for travel purposes. The two spent days avoiding photographers during their trip to London last week as rumours grew that the romance is back on.

The pair were spotted checking in at London's Heathrow Airport for their flight to Los Angeles on Monday arriving at the terminal separately. The pair then stood some distance apart as they waited at a check-in desk - with security men trying to foil attempts to photograph the couple.

But eventually Lohan realised their secret was out - and posted on her Twitter.com page as the pair waited for take-off, dropping a huge hint about their relationship.

She wrote, "Leaving London but with my favorite favorite!!!-travel buddy & great news to share!! Maybe...."