RAF PRAYER unknown marks . Help requested

I am trying to help identify the maker of an item with these marks. I don’t think they are UK silver hall marks but I may be wrong. It is on the reverse of a small silver plaque given to a mother whose son while serving in the Royal Air force. Any advice welcome as we are trying to identify the maker to order more. Many thanks in advance.
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These are pewter marks, not silver marks. The maker was A E Williams: https://www.aewilliamspewter.com/

Phil

thank you. I had done some searching earlier after I posted here, and came to the same conclusion, but it’s good to know you confirmed my findings.