ollie989898
Member
The problem is that the purification requires keeping the shell fish in certified pure water for a couple of weeks . This is water without and bacteria or virus contamination from sewage etc. which is not easy to find around the UK.
Sewage contamination os good for shell fish growth but bad for your stomach
However keeping them in pure water is not good for shell fish quality so has preferably been done close to the consumer.
I understand this is done routinely for a lot of shellfish product anyway- they are purged in tanks in which the water quality is tightly controlled. I believe it is done in sea water or something closely approximating it. Friends of mine had a family business doing just this and had tanker loaders of sea water brought to the site for just this purpose. Of course the whole market is orientated around high end restaurants and consumers looking to buy the stuff to eat at home- of which there will be next to zero demand at present I would suggest as we are all in lock down. Certainly, all the product my friend's family prepared was transported to London daily by truck.
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