RS INTEGRATED SUPPLY UK in London Reviews

It is mentioned in the job offer that RS Integrated Supply UK is currently seeking a Warehouse Store Person for their site in Daventry. The responsibilities include receiving and processing shipments, picking and packing orders, inventory control tasks, and maintaining a clean warehouse environment. It would be helpful to know if any specific qualifications or certifications are required for this position. Are there any specific training or certifications that the Warehouse Store Person needs to have? Additionally, the job offer states that the position requires full flexibility with shift patterns and shift allowance is applied to the late shift. Could someone provide more information on what the shift allowance entails and how it is calculated?