Sir Paul McCartney has sparked engagement rumours after he was spotted shopping at a top London jewellers, just weeks after finalising a divorce settlement from estranged wife Heather Mills.

The former Beatle was snapped by photographers shopping at exclusive New Bond Street store S.J. Phillips yesterday, fuelling speculation he is to propose to American heiress Nancy Shevell.

The 65-year-old recently returned from a romantic Caribbean holiday with Shevell after settling his $48.6 million (£24.3 million) divorce from his former wife last month.

The pair was spotted getting close on the beach of a private resort - splashing out on a $12,000 (£6,000)-a-night villa, enjoying hand-in-hand walks along the coast, a sailing trip and frolics in the sea.

And now, the Mull of Kintyre hitmaker seems to have taken the relationship to another level with his jewellery store jaunt.  S.J. Phillips confirmed McCartney was shopping at the store - but refused to say what the singer purchased during his visit.