BBC article speculates they could be deducted 21 points or face a financial penalty. With those odds, you could be forgiven for thinking that "someone" is in the know. Championship: The relegation battle that could be decided by lawyers https://www.bbc.co.uk/sport/football/53484188
Some bookies had them at those odds last week. Somebody somewhere knows something that's for sure, some are saying they have accepted 15 points to save a further deduction next season
Smarkets is an exchange: you can set whatever odds you like when the outcome you're interested in does not have a price. Edit: technically, both the back and the lay options need to not have a price for you to be able to set 1.01, at least on Betfair.
There's plenty of rumours flying about, people are bound to put money on it. Doesn't necessarily mean anyone has inside knowledge.