It all depends on how its implemented. Data protection laws will only come in if Lcfc or whoever are storing data, if you are providing the data only then there is no issue.
In terms of agreeing to be in the program, I've not checked but I'm 99% sure Lcfc wil have a clause on tickets saying entry can be refused for whatever reason.
Whilst the temporary laws may expire in October, new ones will be being drafted to succeed them. These will come into play come October unless Boris deems them unnecessary by then, but whether they'll be enforced strictly is a different question.