Suitable Power Supply for 0.4A / 400mA Usage

The power supply is rated at 800mA but this is just the "available power" - 

your device will only take what is required and will not be damaged by using this power supply. 

Brand New 24v 0.8A (800mA) Power Supply

UK 3 PIN Plug

5.5mm x 2.1mm Tip

Part Number: FLD181-240080-13B22

Model: FLD181-240080-B

Input: 100-240Vac 50/60Hz 0.45A Max

RoHS & CE Marked