A warning came round on the departmental email list that “NERC recently started to office reject grant applications containing incorrect font sizes”. It seems that their regulations state:
Principal Investigators should ensure that all proposal contributors are aware of and meet the submission regulations set out in the NERC handbook e.g. attachments should be of the correct length, font size etc. Please see paragraph 171. of the NERC grants handbook for detailed regulations. Proposals not adhering to the rules will be automatically rejected and will not be returned to applicants for corrections.