Jimmy Stringer, 23, was one of four people who smashed their way into Michael Jones Jewellers in Banbury, armed with sledgehammers.
He was jailed today for five years and three months for his part in the robbery. Passers by helped bring him to justice, holding him down until police arrived.
More top news
Tuesday afternoon's forecast for the east of the region
Forecasts show around 480,000 people are to move through Gatwick airport over Easter period.
Tuesday's weather for the east of the region