The Labour Party was once a movement of muscular Christians. Now it's a smear to report that Christians have donated to their opponents. Since all the major donations are public (no real journalism was therefore required to research the linked article) the word "secret" is certainly nothing but a smearing innuendo.
Since religions prosper under persecution and poverty - Labour and its fellow travellers seem intent on creating the conditions for a great Christian revival in Britain. Though I am an atheist myself, it would not particularly bother me. I share most of the Christian values in which our civilisation was marinated for centuries. At least, unlike the Liberals, Christians would return with the same values as when they were last influential.I had to smile, rather sadly, at the observational comedy of one Conservative donor, Christian businessman Michael Farmer: