The story is behind a paywall, but The Times has tweeted this copy of its back page, which contains a decent chunk of the article:
The part that isn't on the back page goes on to discuss the police having allegedly obtained a witness statement from a former employee of an 'intermediary data provider' with regard to the billing of a top football agent. It's claimed that information from such providers is accepted by football tribunals, whereas in the criminal courts the only billing data that can be given as evidence is that supplied by mobile networks themselves.
Some of these intermediaries are said to offer billing adjustment services as one of their selling points, and the above witness statement supposedly details correspondence with the top agent in this regard in the context of a dispute with a player that was to be considered by an FA tribunal. A colleague of the witness allegedly made changes to data that was going to be presented as evidence to the tribunal.
Once stuff like this starts being looked into, you never know what else will come out and who'll be affected. However, based on the above, I really don't think that there are any grounds to suspect that MCFC are involved unless/until we receive further information to that effect, and panicky speculation to the contrary (of which I've seen a bit on Twitter) doesn't particularly help anyone IMO.