A Grand National winner's trophy hurdled its valuation when it sold for �1,600 after being auctioned by the winning jockey's Norfolk relative.

Jockey Bob Lyall's silver gilt trophy was expected to fetch between �800 and �1,200 at Rowley's Fine Art Auctioneers in Newmarket, but exceeded that figure after being sold by one of Mr Lyall's descendents, who lives near Diss.

Mr Lyall won the trophy on racehorse Grakle in 1931, having completed the Aintree course in record time, winning �9,310 – the equivalent of just under �500,000 in today's money.

His Manchester-born trainer, Tom Coulthwaite, who had already secured two earlier Grand National successes in 1907 and 1910, retired the following year, having successively trained three winners of one of the most famous and difficult steeplechases in the world.

Sadly, Mr Lyall was crippled for life just six months after winning the Grand National, in a point to point accident.