[REF] Parse ids before sending to single function (minor simplification)

[REF] Parse ids before sending to single function (minor simplification)

Overview
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Minor simplification - parse ids into valid format & pass them into single, rather than passing them in wrong & 'asking' single to parse them

Before
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parsing of ids into usable array done at the last minute, other values passes around unnecessarily

After
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parsing done close to the point where they are derived

Technical Details
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Comments
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