How this index was made
Sources. Every price, date and class size was read from the provider's own page. Those pages were fetched once, stored locally, and each figure was then read from the stored copy — never from an aggregator's summary. Each entry carries the date its source was last read; 100% were read within the last 90 days.
Verification. A figure marked inferred follows the provider's course-format convention but wasn't stated outright. Entries reading on application hold their price behind a booking platform; they are not guesses.
Independence. No affiliate links, no sponsored placements, no booking fee. Every booking enquiry goes straight to the maker. 167 of 213 entries run in one to three days, prices from £25, and 18 are dated in the calendar.