While looking for some information on a Goliath-like vehicle produced by them I pottered onto this Digital facsimile of a book given to employees to mark 50 years in business:
Interesting stuff if industrial/Technical history is sometimes your thing and you don't mind a bit of contemporary PR.
The 'War Years' chapter has much on the wide range of military products, from undercarriages & UXB sterilisers to navigation equipment & the first Radar transmitters (and all points between). Also a good deal on the 'social history of the company at war, air raid precautions etc.
Cheers,
Adam.