Her goes:-
SOTON course:-
www.taster.ecs.soton.ac.uk/electronic-and-computer-science-taster-course
Other week long uni courses CS and STEM (Headstart run by EDT):-
www.etrust.org.uk/headstart/courses
Small piece trust mainly physics and engineering but with one CS:-
www.smallpeicetrust.org.uk/course-category/momentum/
Smallpeice trust Cybersecrity:-
www.smallpeicetrust.org.uk/course-category/cyberfirst/
Easter course at aston uni (but was outside DS holiday dates):-
www.unitasterdays.com/eventDetails.aspx?ID=57407
One day free tasters in maths or cs (and lots of other subjects) at London Universitys
london.ac.uk/taster-course-search/taser_course_subject/73/taser_course_subject/753?search=&page=2
One day Oxford Uni session for folk doing further maths but not sure what to do next:-
www.cs.ox.ac.uk/admissions/undergraduate/open_days/open_days.html#Further_Maths_What_Next
We also found work experience options at Vodoafone, Ernst and Young, Diamand Light Source and Rutherford Labs but they will be hugely competitive so hope of getting them is slim.
There are also paid for Coding courses but a lot are either aimed at younger children or adult beginners or are horrendously expensive. There are lots of on line coding courses though DS is going to spend some time on over the holidays. The difficulty was finding the right level, not too expensive and at a time that didn't clash with anything else.
He was tempted by the debate chamber maths courses that look great but was in danger of overloading the summer especially as he usually finishes each term exhausted and wants to get some paid work in too. I think it may be a case of getting some useful stuff in this summer though with the promise of a long complete break next year after exams.