Ancestry.com do it:
http://dna.ancestry.com
For guys:
Paternal Lineage Test (Y-Chromosome 33) — Recommended
Find genetic cousins and learn about ancient paternal ancestry. This is the recommended test for genealogy. For male participants only.
$149
Advanced Paternal Lineage Test (Y-Chromosome 46)
Thirteen additional markers provide a more precise comparison with other participants who also have the advanced test. For male participants only.
$199
Maternal Lineage Test (Mitochondrial DNA)
Learn about the ancient ancestry and early human migrations of your maternal line forbearers. For both female and male participants.
$179
For the ladies:
Maternal Lineage Test (Mitochondrial DNA)
Learn about the ancient ancestry and early human migrations of your maternal line forbearers. For both female and male participants.
$179
Female Participants:
If you are interested in exploring your paternal lineage, a DNA sample must be provided by your father, brother, or a male cousin on your father's side. Choose "MALE" for the participant's gender and select a Paternal Lineage test.
So I'll research the company a bit more and see if there's any UK based ones or if this is the best.
Closer to home:
http://www.oxfordancestors.com/index.html
Meanwhile, one Oxford-based company will tell you which mitochondrial "clan mother" you are descended from. This just means assigning your mitochondrial sequence to one of an arbitrary number of ancient lines of descent. This is a routine operation in DNA studies, and was never thought to be of any interest to the person concerned - it is simply a first step in identifying prehistoric human migrations.
But in its elevation to a commercial process, it seems to have taken on a deep significance. Old notions of national identity are replaced by a quasi-spiritual identification with one's clan. Each clan mother has her own moving tale of struggle and survival in prehistoric Europe to tell - with little or no scientific backing. Provision is duly made for you to meet your fellow clan members. Not bad for £150. There is only one catch:all that these people share, in the end, is a short, not very meaningful DNA sequence print-out. This is genetic determinism at its crudest.
Source:
here
Also:
http://www.rootsforreal.com/index.php
So it is a basic rough estimate, but I'm not thinking it's going todo much more than basically say you're this DNA.. although it will be more interesting for my family's descendants.