Sentinel (grid reference SP13789065) is a 16-metre-high (52 ft) sculpture by Tim Tolkien, installed upon Spitfire Island, a roundabout at the intersection of the Chester Road and the A47 Fort Parkway at the entrance to the Castle Vale estate in Birmingham, England.

[1] It is near Junction 5 of the M6 motorway and the present day Jaguar Cars plant (the former Castle Bromwich aircraft factory).

The half-scale Spitfires are made of aluminium, with curving steel supporting beams which act as vapour trails.

The main commercial sponsors of the spitfire sculpture were from Jaguar, Rubery Owen Holdings and Cincinnati.

The Castle Bromwich Aerodrome Factory was built in 1940 to produce planes for the war effort.