In reply to tom dean gately:
Crucially you don't say whether you'd be driving on your own, or climbing on your own, or what style and standard of climbing you're after. If you're driving on your own from (say) central Scotland it'll probably take you 2.5 days minimum each way if you're to avoid dangerous fatigue, so over 30% of your holiday time. Most UKC folk would advise you to fly to Geneva and base yourself in Chamonix: readily accessible, a huge range of quality climbing in a compact area, so no need to have your own transport; lots of Brits to climb with; you can get by with minimal French.
There's masses of information on the Forum about travelling to the Alps and about Chamonix as a base, just use the Search facility.