Contrary to Chenmunka's answer, any in depth study of the American revolution is not mandatory by Key Stage 3 (High school) national curriculum.
In the UK we have two different types of 'lesson'; Statutory and Non-Statutory, the latter of course being a subject that is 'optional', and can be taught at the teachers/schools discretion.
There is Statutory Module in Key stage 3 history called Ideas, political power, industry and empire: Britain, 1745-1901, which contains as an example of a possible lesson plan 'The Seven Years War and The American War of Independence'. It's plausible the Boston Tea party would be included as part of that lesson, should the school choose to pursue it.
However, this is optional and is listed among other, potentially more pertinent lessons like 'Britain as an Industrial Nation' and 'Ireland and Home Rule'. Both these subjects, as well as broader subjects like the Enlightenment will likely be prioritized, particularly considering likely exam questions.
I was educated at Key stage three (1998 -2003), and we were taught nothing on the American War of Independence. I have an 18 year old Nephew who told me he learnt everything he knew about the American war of Independence from the computer game Assassins Creed 3, and it's still only on the syllabus as an optional sub-part of a larger module.
Despite not being formally educated on the subject, however, the reference to the Boston Tea Party would not be lost on most British adults, I would hope.