OK, slightly poor wording. LAPL is 30 hours including at least 6 hours solo and PPL is 45 hours including at least 10 hours solo. The upgrade is 10 hours including at least 4 hours solo but you have to have completed at least 15 hours after issue of the LAPL before the PPL can be issued so, in practice, you will require a total of 45 hours but 5 hours can be other than as part of an approved course. By the time you've paid for the dual check for the 5 hours SFH, I doubt there will be any significant saving.