Sampler for 2 hours. Use it by free self-enrolment as per procedure set out at 

A course for the advanced user of English - those who know grammar well and write grammatically correct but verbose, indirect and clichéd English. Emphasis on reducing verbosity and improving directness & clarity. Guidelines to write culture-free English and thus reduce burden on non-native English readers. In addition, adequate coverage of typical errors in grammar and usage, even by advanced users.