There is no single correct answer, and treat anyone who gives you one exact number with suspicion. DVSA's own most-recent published figures put the national average at around 45 hours of professional tuition plus roughly 22 hours of private practice before a first test - but that is an average across a huge range, not a target for any one learner.
What actually moves that number
Starting point - complete beginner vs. some prior practice
How often lessons happen - weekly consolidation is slower than an intensive block
How much private practice happens between lessons, with a supervising driver
The specific test centre's routes and how much of the local area they cover
That last point is why a 2-hour assessment lesson before committing to a block is worth doing: it gives an honest, specific starting estimate for you, on real Glasgow roads, rather than a generic industry average.
Planning a realistic block instead of guessing
Rather than booking one lesson at a time indefinitely, most learners get better value and faster progress from a block - our 10-hour manual or automatic packages are priced as a block for exactly this reason. If 10 hours turns out not to be enough, that becomes clear well before the end of it, and another block is simply added; it is far less common for a learner to need drastically fewer.
Automatic vs. manual: does it change the number?
Broadly, automatic tuition tends to reach test-ready a little faster, since clutch control and gear selection are removed entirely and there is more attention available for observation and hazard awareness from the very first lesson. See our full manual vs. automatic comparison for the practical trade-offs beyond just lesson count.