Pete,
This claim for compensation won't cost much - I have the funds / resources to handle this myself. And it is just a claim for compensation and not a full legal case against BT for the trials.
I have discussed that second point and that would be really expensive. Lets wait and see what the ICO follow up with, what the parliamentary ombudsman says, what the City of London Police conclude with Alex's case file and what Vivane Redings team do about it and worry about a privately funded case later