The school I used for my CPL the advanced training rate was close to £200 even on PA38 so extra 5 hours would have really hiked the price up, plus I doubt I could have bribed my instructor with anything less than 4 figure £ to stay until 9pm
Where now its getting darker earlier I now do night ratings for £820 over 2 / 3 nights.
Caa still charge be least there is no exam cost for once, wonder if EASA will change that