Hello I am a lawyer with over 15 years of experience and will try to help you with this.
There is no law against renting more than 1 property at a time. I assume that you mean residential properties. There may be clauses in the individual leases which insist that you must occupy the property as your only or principal residence. Would you like to explain your situation a little more?
I am on the contract / not only by myself/ on 4 properties.
Apart from the contracts which say that if I let other people in I will be in breach and I have to vacate the property there is nothing else
I am curious about the council- can they fine me for being on the contracts on those 4 properties?
Are these 4 properties council proprties? Are you running a business where you rent properties and then sublet at a profit?
no, they are private properties.
We are subleting them unlawfully
Ok so yo are subletting in contravention of the terms of the tenancies which you have signed confirming that you live in the properties. Obviously you are in breach of the tenancy agreement and the landlord could take possession proceedings against you which if they were brought competently would be bound to succeed.
I think you may be open to an allegation of fraud. The Fraud Act 2006 states that a person is guilty of a fraud if he dishonestly makes a false representation and intends by making the representation to make a gain for himself.
If there is evidence you deliberately entered into the tenancy agreements with your landlords intending to sublet for a profit then you might well fit within the legal definition of fraud. The false representation being that you intended to live there as a tenant. It is not possible to advise on likely sentence if convicted of fraud as the sentence is largely dependent on the value of the fraud. The guidelines can be found here. http://sentencingcouncil.judiciary.gov.uk/docs/web_sentencing_for_fraud_statutory_offences.pdf
I hope this answer is helpful but if you have any further questions then please ask.