The puzzle icon is shown at one of Milton Keynes' educational establishments, in this case Denbigh School in Shenley Church End.
However, the cache is not at this location. Please do not attempt to park or search there. It is private land.
As with all of this series, we are available for mentoring and support by email on request.
GCSEs were introduced into secondary schools in England in 1986 to replace the previous GCE "O" Levels and CSEs. They are available in a bewildering array of different subjects in a number of distinct categories. Electronics sits in the Science & Technology category.
Passing this examination will reveal Bonus Code C for MK Schooldays: Graduation Day.
Electronics Examination: Time Limit 16 milliseconds
So you'd better be quick. The picture below gives you everything you need.
The final cache is a 10cm diameter screw top plastic box covered in camo tape. It contains a small log book only. Please, as ever, take care to replace the cache as you found it.
As you will most likely solve this at home before venturing out, the final cache is placed where the calculated coordinates appear to be on GoogleMaps. This may be a few feet from where your GPS thinks it is.
We hope you enjoy your studies and that you get the grades you need.