I thought I'd point out that Keith Wilson's Haynes manual on the VC10 is actually just a few weeks away from hitting the shops. It is available for pre-order from Amazon, see here: http://amzn.to/2cCxNjc
If you want to get it from another shop, it is due out on 6th October according to Amazon, Haynes itself just state 'in October' (see here: https://haynes.co.uk/catalog/general-in ... c10-manual). You might want to start badgering the salespeople at your local bookshop...