I believe I am correct in saying the following.
Assuming that you have all the other criteria covered (hours, exams etc) The next LPC can also serve as a Skills test for unfreezing the ATPL.
But remember, the examiner on the day must be able to confirm that the hours are sufficient, and he MUST tick the Skills test option on the form.
A letter from company can also help here if needed.
If he forgets to tick the SKILLS test box, and the paperwork is processed, This cannot be done retrospectively.
I believe the following are correct-
minimum, 1500hrs total time. Upto 50hrs simulator can also be used towards this.
500hrs Multicrew operations. JAR ATPL. (but not entirely certain about this aspect)
On the LST form the box for Skills test, or JAR skills test must be ticked in addition.
Following succesful completion. Hand Licence, logbook, forms to CAA, plus the horrendous bribe they now charge. about 3 days later a shiny green version of what you already had will turn up, with AT replacing CP.
Hopefully, this is all correct, but I have a handy fire extingiusher to hand for the flaming that may result!