This 100/4 BN2 left the factory with Healey Blue paintwork, a blue hood and interior trim, a laminated windscreen and optional heater.

In 1955, a number of ‘100M’ or M-Spec cars were tweaked for fast-road driving or motorsport, the chief upgrades being with larger carburettors, a specialised cold air intake box, high-lift camshaft and 8.1:1 compression pistons.

These M-Spec cars were good for 110bhp and were easily identifiable by the louvred bonnet and belt.

These modifications were also made available with a ‘Le Mans Engine’ kit which allowed existing Healey owners to convert their cars to M-Specification without incurring the considerable costs of purchasing an entirely new vehicle.

This fine example has had that work carried out by Denis Welch Motorsport and ‘A Head 4 Healeys’ of Rugby in 2010, as evidenced by numerous invoices, bills, receipts and dynamometer tests.

A good deal of its liveliness and agility is owed to the car’s construction.

With the exception of the boot li...