Step 1 would be to make sure there's a shop that you can play standard at that's within driving distance of where you're moving to. If it's London, you should be OK.
Check out this link. It aggregates the top decks from all recent events as well as MODO. Abzan Midrange is probably the current most popular deck in the format. They're all built differently, but most have 4 ofs of Siege Rhino, Courser of Kruphix, Sylvan Caryatid and then some number of Wingmate Roc, Sorin, Solemn Visitor, etc. But that link should give you all the information that you need.
The current duallands are the temples from Theros block, the off color pain lands in M15 core and the fetchlands in Khans of Tarkir. So 40 Temples, 20 pain lands and 20 fetches. Keep in mind this is going to run you several hundred dollars just for all the lands if you want to just have a playset of every rare land in standard.
Fetchlands are useful because they are strictly better than a basic land. The deck thinning is pretty negligible from a statistical point of view. They're not that powerful in standard. They shine more in eternal formats where they can actually fetch up dual lands and shock lands since those lands have both of the basic land types. For example, tundra counts as both island and plains so it can be fetched with any fetchland that can grab either plans or island which is quite a lot.
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