The A4303 is a short A-road near the Leicestershire town of Lutterworth. It is D2 dual carriageway for its entire length, broken up with frequent roundabouts.
The road starts at a roundabout on the A5 and heads east, giving access to the Magna Park distribution centre. It then bypasses Lutterworth to the south, meeting the A426 at the Sir Frank Whittle Roundabout to provide access to the town and also to Rugby, before continuing to the M1 at Junction 20.
This road has been renumbered on several occasions but by the time the Lutterworth bypass was built it had become the A427. That road was renumbered west of Market Harborough when the A14 came along, to discourage traffic from using the road as a through route. The A4303 is the only section of the ex-A427 to retain primary status.