Had in the Newcastle store, the guy said it was standard stock, so should be in all stores.
blurb from persil.com:
new BIGGER small & mighty
Economical, environmental and effective too
When it comes to Persil small & mighty, less is more – and more is less. That's because small & mighty now comes in a range of bigger packs, which are better value than ever before. They give you more washes for your money than powders*, and when you wash at 15°C you can save over £1 on energy with every pack**.
That makes our bigger packs friendlier to the environment too. Which when you think that small & mighty is also 2x concentrated, taking ½ the water to make it and with our bigger packs saving up to 50% less packaging***, our new sizes are our greenest ever!
Of course, small & mighty offers our best ever clean too. Now with new cleaning technologies like pre-treating agents and Active Microcapsules tackle tough stains such as grease, oil and grass even at temperatures as low as 15°C – with brilliant results.
And as always, you only need a single capful to do it.