I find that very intriguing, would you mind giving details of these places and the cluster of pleasures they have, as a city destination, that makes London inferior.
That's a shame Amaroo - I have Greece and Turkey penciled in for April 2016. Would have been great if we were there later and could pick your brains
Thanks everyone for the suggestions - lots more reading for me to do.
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Of course London is an amazing city and many others here have shared their knowledge well - the OP will have picked up some wonderful tips and be in for a great stay. In fact I have too.