CCTV appeal after pharmacy burglary

We are appealing for witnesses following a burglary in Farnborough.
At about 8.15am on Wednesday 7 September a man entered the staff only area of Lloyd's Pharmacy inside Sainsburys on Queensmead.
He took an item of medication and left and when security challenged him at the exit he threatened to use a knife against the security officer.
The medication was then returned before the man left the store.
Following initial enquiries we are now releasing two images of a man we would like to speak to regarding this incident.
He is described as:
- Aged 18-25
- 6'0'' tall
- Black
- Black hair
- Wearing a balck baseball cap, black jogging bottoms, hooded jumper, black and white Nike trainers and Nike backpack.
If you are this man, or recognise him, please contact 101 quoting reference number 44220364629.