What changed is that they are now agrresively charge you these days.

In London area (city and outskirts like Oxford) its £1500-2000 per 10kw and they count the PSU rating regardless of what you actually use. And that is on paper only as many DCs limit a rack to 20A which gives 4.8kw only so if you need more you need to lease another rack which costs more money. And leasing adjacent racks also isn’t really cheap they usually give you maybe 2-3 ones if you need more than that well then you are now leasing floor space which means if you need say one rack with 15kw rated bare metal you may end up having to lease enough room to hold 10 racks if not more.

Oxford is not outskirts of London. It's 50 miles of farmland and towns away.

Outskirts in this case is anything that is about an hour from the circular but that could be just me.