By ANNA USHER

A British man and woman have been refused bail after police allegedly seized 107 kilograms of ketamine, cash and suspected drug ledgers across Artarmon and North Sydney.

Detectives will allege the pair travelled to Australia for the sole purpose of supplying large commercial quantities of prohibited drugs on Sydney's lower north shore.

The 30-year-old man and 23-year-old woman, both UK nationals, were arrested at a North Sydney hotel, taken to Chatswood Police Station, charged with drug supply and refused bail.

Two raids, three days apart

Detectives searched a unit on Hampden Rd, Artarmon around 7.10pm on Friday 26 June as part of an ongoing investigation.

They allege they found approximately two kilograms of a drug believed to be ketamine, scales, disposable gloves and clear resealable bags holding a white crystallised residue.

Officers also found luggage, and police will allege the unit had been rented for a short-term stay.

Three days later, about 3.20pm on Monday 29 June, police executed a search warrant at a North Sydney hotel and arrested the pair in their room, allegedly seizing several mobile phones, more than $2000 in cash and documents police will allege were drug ledgers.

They then searched a car allegedly rented by the man and parked in the hotel carpark, allegedly finding about 105 kilograms of a drug believed to be ketamine in the boot.

Before the court

The pair were each charged with supplying a prohibited drug in a quantity larger than the indictable amount but less than the commercial amount and supplying a prohibited drug in a large commercial quantity.

They appeared at Manly Local Court on Tuesday 30 June and were refused bail, before their matter was set down for Downing Centre Local Court on Wednesday 26 August.

Police say further investigations into anyone else who may have been involved are underway.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or nsw.crimestoppers.com.au. Information is treated confidentially. Police remind the public not to report information through NSW Police social media pages.

Mosman Collective is the lower north shore's own newsroom. For local news first, subscribe free to the Mosman Mail.