Steven Derek Lea, 40, of no fixed abode, was charged with attempted robbery and possession of an offensive weapon in a public place.
Both suspects are now remanded in custody.
As reported last week, police also wish to hear from anyone who may have seen a red Fiat Punto (reg: MJ54 RJV) between 9am and midday on Sunday, May 31.
Police believe the car headed towards the Upgate area after it left the store.
• For full details, visit https://www.louthleader.co.uk/news/crime.