This was posted last week (and assumed to be only for last week) but I did a search and it seems it is an on-going promotion on every sunday until the 8th of May. Not bad, but it's only off the belt and not ala carte.
Pop down to YO! Sushi Oxford Circus (just behind Oxford Circus tube station) on your own, with some friends or bring the whole family and see just how much sushi you and your party really can munch on!
From Sun 10th April until Sun 8th May you'll be able to enjoy All YO! Can Eat off the belt until you heart's content.
£18.50 for adults
£9.50 for children under 12 years old
This offer is valid at YO! Sushi Oxford Circus only from Sun 10th April until Sun 8th May (inclusive).
At the end of your meal you will be charged £18.50 each (children under 12 years old to be charged £9.50 each) plus any drinks or extras that you have consumed (food that has been ordered).
Everyone in your party/table must choose the All YO! Can Eat option for the offer to be valid.
You must finish ALL food on all your plates or you will be charged full price for that plate.
All YO! can eat offer applies to guests eating off of the belt only, not a la carte.
Offer excludes grey and yellow plates.
Offer not transferable or available in conjunction with another offer (e.g. Student discount) and there is no cash alternative.
YO! Sushi Manager's decision is final.