Description

Please describe your awesome pull request

Checklist

Important

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• Included a What's New entry
• Incorporated type hints in any changed code
• Checked if tests need updating
• Checked if benchmarks need updating
• Checked if documentation needs updating
  • Docstrings (we love code examples!)
  • User Manual pages
• Checked if dependencies need updating
• Confirmed that the GitHub 'checks' on this PR are passing ✅ (further reading)

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• Add this label to trigger benchmarks: benchmark_this Request that this pull request be benchmarked to check if it introduces performance shifts
• Visit this URL - swapping 9999 for this PR's number - to re-trigger the CLA check: https://cla-assistant.io/check/SciTools/iris?pullRequest=9999