Sorry yes I was including aircraft hire, I thought you guys were too! FE's charge about £175 down my way. The test is about 2 hours so going on a typical rate of £130 p/hr that's £260 + £175 = £435. Add a few circuits and there's your £450.
I wouldn't expect the school package to include a/c hire for the test in the price. The OP did say:
JAR PPL licence Including 45 hours training