Because of a change to the UK electrical installation regulations the costs for a Domestic Consumer Unit (Fuse Box) are very likely to increase and the new Consumer Units that I have seen for far from manufacturers are not so compact or pretty to look at. The pricing for these new Consumer Units will be become clearer as more options from manufacturers become available.
However the good news is these new Consumer Units are designed to be a lower fire risk than many previous designs, because that is why they have changed the regulations!
These regulation changes for Consumer Units come into force from June this year but to allow for Manufacturers to get organised with new products there is an agreed relaxation that both old and new regulation Consumer Units can be used until January 2016.