Beneath the DB11 body, this mule is using the Vantage's next-generation bonded aluminium architecture, which is a shortened version of the DB11's, as well as the future Vantage's suspension.
Prior to the UK sighting, a similar development car was filmed testing at the Nürburgring, where the tone of the next Vantage's V8 engine was heard.
The unit is a Mercedes-AMG 4.0-litre twin-turbocharged V8 that's expected to produce around 500bhp in the entry-level car and 550bhp in the Vantage S. The engine is supplied as part of a technical collaboration between the two brands and will use Aston's own software. This will also result in a V8 version of the DB11 using the eight-cylinder unit.
Like the current Vantage, a V12 version of the next-generation car is also due, using the same 5.2-litre twin-turbocharged V12 engine of the V12 DB11.
The V8 Vantage will likely be offered with a dual-clutch automatic or six-speed manual gearbox.
The car is still some way off from being officially revealed, but insiders think it could make its debut late this year.