What are these criss-cross patterns close to Cambridge Airport (UK)?
In 2017 there was a major archeological dig in the area of Hatherdene Close and Coldhams Lane at the south end of the Cambridge airport.  The "criss-cross patterns" are additional exploratory trenches as part of a "Preliminary Archaeological Investigation".

Welcome
to the public consultation on the emerging development proposals for the creation of a new
neighbourhood at Land North of Cherry Hinton



Anglo-Saxon artefacts unearthed on Cambridge building site







The area is also the subject of a Planning Document. I had a quick read through the document and I found a reference to "Preliminary Archaeological Investigations", which are the trenches seen in the aerial photo.  

LAND NORTH OF CHERRY HINTON Planning Document