I am sure everyone has their own list of what is important to them when picking somewhere for their co-location supplier, or a data centre in which to place their servers.
Such a decision is a big one, and it is a lot of hassle to move servers later and something that ideally businesses and end users would want to avoid.
But rather than tell you what I think you should look for in a data centre or hosting provider, perhaps it's worth a try on opening up this thread to those hosts in the UK who can supply these services as to what they think should be top of the list to watch out for and check on.
So here goes! A thread of Co-location providers hopefully telling us what the most important factors in data centre choice are.