Nigel, beware of being influenced by anything about beekeeping in the USA - at least until you understand the context --- it is quite different from keeping a few hives in Wales! "CCD" is part of US beekeeping - not the European version.
Over the last 20 years beekeeping has had to change, varroa control is now a vital element in the annual cycle.
Unchecked, a colony would be expected to die out in less than 3 years as a result of varroa and the viruses that it vectors.
Varroa control isn't optional in the UK. It is a massive part of the keeping of bees alive.
Download (free) and study the official advice "Managing Varroa" from
https://secure.fera.defra.gov.uk/beebase/index.cfm?pageid=167
It will give you a good understanding of the nature and scale of the problem. The forum can help greatly with practical questions when the time comes.
There are lots of other useful info sheets and booklets on the linked page - bookmark that page!
I'd also note that practically, two colonies is a sustainable minimum, giving you a complete set of spare parts (bees, bee eggs, comb, etc) that money can't buy, available at any time that beginner's mistakes (or blind fate) may make them necessary.
Beyond that, you do need quite a lot (nearly 100% extra) of spare kit for swarm control (particularly in the early years!)
Wasp stings are different to bee stings.
And wasps are to bees rather as foxes are to chickens. As a beekeeper, you will find wasps attacking your bees, stealing their honey and destroying the colony.
Get some modern bee books from your local library - the Haynes manual is actually quite good - and only buy anything that you think you might refer back to.
Hooper (Bees and Honey) is very good, but the addition of a few pages on varroa has not brought it up-to-date. It needs to be read against an understanding of modern differences, and therefore it is emphatically NOT what you need right now.