CGP free Functional English online 10 minute tests (L1, L2)

These 10 minute tests are very good (one test at each level, each test has 15 multiple choice questions).  
Slightly disappointed that, unlike the maths ones, there is no guidance / explanations when you check your answers. 
However, I do like the:

• good curriculum coverage (grammar, purpose, organisational features, language features, vocabulary, punctuation, finding information, tense and more
• engaging texts
• clarity