Drug dealers who imported heroin and cocaine valued at £2.5m have been jailed for a total of 65 and a half years.

Thirteen people were convicted at Reading Crown Court and eight were sentenced on Thursday, November 7, and Monday, November 11.

The Thames Valley Police Serious and Organised Crime Unit (SOCU) began investigating Richard Boyles, 33, from Hill Farm Lane, Chalfont St Giles, and his right-hand man Oliver James, 32, from The Green, Wooburn Green, in January 2012.

The investigation was in relation to the wholesale supply of cocaine and, later heroin.

The police found Boyles and James were being supplied with cocaine by Kole Dean, 31, from Exmouth Road, Ruislip, the owner of TJ Property Maintenance Ltd, and his two employees, Gjok Leshaj 27, from Exmouth Road, Ruislip and Edmond Haxhija, 33, from Crispin Way, Uxbridge.

TJ Property Maintenance acted as a disguise for the drug supply, using company branded vans to deliver drugs around the country.

Boyles and James then supplied the cocaine to William Hearn, 27, from Orchardville, Burnham, who was selling it on to his regular customers.

As well as supplying cocaine to Boyles and James, Dean was also supplying it to Mark Sullivan, 42, previously from Branksome Avenue, Hockley, Essex.

Kole Dean also pleaded guilty to supplying the 2kg of cocaine to Sullivan.

While carrying out the investigation into the two men for cocaine supply, officers discovered Boyles and James were expecting a delivery of 10kgs of heroin, worth around £2 million, which was brought into the country by Grant White, 33, from Cromwell Road, Whitstable, and was to be stored at Nathan Worthington’s, 35, flat, in Bath Road, Slough, with Wakas Ahmed, 26, from Connaught Road distributing it.

Officers carried out a warrant at the Bath Road address on October 18, 2012 and seized 20 half kilo packages of 50 per cent pure heroin. Worthington was arrested and charged with conspiracy to supply heroin, and remanded in custody for trial.

Officers said once Boyles and James had the drugs seized, Dean no longer supplied cocaine to them, meaning Hearn obtained his cocaine elsewhere.

He contacted Andrew Sibley, 27, from Beards Road, Ashford, and Albie Griffen, 23, from Hyde Terrace, Ashford, who stored the drugs at Martin Bennett and Emma Riley’s home in Worple Avenue, Staines-upon-Thames, and purchased a kilogram of cocaine from them.

Hearn, Sibley and Bennett were arrested on February 11, and Riley was arrested on February 12 and Griffin on February 26.

Boyles, James, Dean, Haxhija, Leshaj, White and Ahmed, were arrested after warrants on March 6.

All were subsequently charged and various pleas and trials took place before the sentencing of the 12 defendants.

Det Sgt Stuart Brangwin, from the SOCU, said: “This was a lengthy and complex investigation into 13 defendants with four different conspiracies to supply drugs.

“The defendants were all aware of the part they played in the supply and distribution of heroin and cocaine on a large scale and I am pleased with the sentences handed out to them. The lengthy prison sentences should act as a deterrent to others who are involved in the supply of controlled drugs.

Sentences:

Richard Boyles, aged 33, from Hill Farm Lane, Chalfont St Giles, pleaded guilty to one count of conspiracy to supply cocaine and one count of conspiracy to supply heroin on 29 July. He has been sentenced to 12 years’ imprisonment for each offence, to run concurrently

Oliver James, aged 32, from The Green, Wooburn Green, pleaded guilty to one count of conspiracy to supply cocaine and one count of conspiracy to supply heroin on 29 July. He has been sentenced to eight years’ imprisonment for each offence, to run concurrently

Kole Dean, aged 31, from Exmouth Road, Ruislip, pleaded guilty to one count of conspiracy to supply cocaine on 19 July and a further count of supply of cocaine. He has been sentenced to 10 years’ imprisonment for one count and six for the other, to run concurrently

Edmond Haxhija, aged 33, from Crispin Way, Uxbridge, pleaded to one count of conspiracy to supply class A drugs on 10 September and was sentenced to seven years’ imprisonment

Gjok Leshaj, aged 27, from Exmouth Road, Ruislip, was found guilty of one count of conspiracy to supply cocaine after a trial which ended on 14 October. He has been sentenced to eight years’ imprisonment

Nathan Worthington, aged 35, from Bath Road, Slough, pleaded guilty to one count of conspiracy to supply heroin on 15 August and was sentenced to six years’ imprisonment

Grant White, aged 33, from Cromwell Road, Whitstable, pleaded guilty to one count of supplying heroin on 29 July and was sentenced to six years’ imprisonment

Wakas Ahmed, aged 26, from Connaught Road, Slough, was found guilty of one count of conspiracy to supply heroin and one count of money laundering on 14 October, and pleaded guilty to one count of possession of a prohibited weapon on 11 October. He was sentenced to eight and a half years’ for conspiracy, four years’ for the money laundering, and one year for the prohibited weapon charge. All sentences will be served concurrently.

William Hearn, aged 27, from Orchardville, Burnham, pleaded guilty to two counts of conspiracy to supply cocaine on 14 June. He will be sentenced at Reading Crown Court, on a date not yet determined.

Albie Griffin, aged 23, from Hyde Terrace, Ashford, pleaded guilty to one count of conspiracy to supply cocaine on 18 July. He will be sentenced at Reading Crown Court on a date not yet determined.

Andrew Sibley, aged 27, from Beards Road, Ashford, pleaded guilty to one count of conspiracy to supply cocaine on 14 June. He will be sentenced at Reading Crown Court on a date not yet determined.

Martin Bennett, aged 37, from Worple Avenue, Staines-upon-Thames, pleaded guilty to one count of conspiracy to supply cocaine on 20 May. He will be sentenced at Reading Crown Court on a date not yet determined.

Emma Riley, aged 36, from Worple Avenue, Staines-upon-Thames, pleaded guilty to allowing her home to be used for the supply of cocaine on 24 June and was sentenced on the same day to six months imprisonment, suspended for 18 months and a 16 week curfew banning her from leaving her house between 10pm and 6am.