Actrosman:
The 6h 12m was taken from my infringement reportSent from my iPhone using Tapatalk
In that case you can safely ignore the well-intentioned comments above about not needing a break and employers writing their own rules.
The simple answer to the question you posed is “Yes, legally you should have remained at work and booked a further 15 minute break (followed by at least another minute of Work).”
On the odd occasion it has happened to me I simply booked off as normal and did a manual entry to include the “missing” break (and 2 minutes of work) next time I put my card in
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