Whats this hallmark 'EP' or 'AI'.

British Silver Reading Silver Hallmarks
1

Hi,

Could anyone provide any info on the hallmarks found on the following spoon?.. Thanks…
spoon.JPG

2

EP is ElectroPlate. The A1 is frequently also stamped on electroplate items presumably to give an indication of high quality. I’m not sure whose trademark the symbols are. At least one of them also appears on items by William Page & Co.