Cranfield being CD. With my slightly nerdy yachtie head on all maritime lights have a colour (default white), characteristic (Fl, Occ numbers etc) and a period eg Fl (2) 5sec would be two white flashes every 5 seconds.
Airfield ident lights are red (military) and green (civ) and Morse coded to the airfield so I guess that detail is not portrayed on the aeronautical chart.
Coincidentally we had this conversation in the car two days ago:
’Didn’t there used to be a flashing red light at Waddington?’
’Yes, it’s the Pundit flashing a morse ident, probably WA’
’Why’s it called a Pundit?’
’mmmmmmmm’. Goes to google.