How would I go to find a good neighbourhood in a new city in the UK? This lifehacker post links a number of sites with neighbourhood information, but it seems that all of them (Streetadvisor, Walkscore, and others) are available for the USA and perhaps a few other countries, but not for (most of) Europe.
I'm looking for general strategies on how to find good neighbourhoods. Although "good" is subjective, crime levels, walkability, access to public transportation and facilities, and cost of living (buy or rent), are not. Ideally what I'm looking for is an interactive map where I could rate how I prioritise a number of criteria, and then I would be presented with a heatmap for an index calculated accordingly. Failing that, I welcome answers that list one or more of those properties.
I am looking specifically for south-central England (Oxfordshire/Berkshire area), but I welcome answers applying elsewhere.