At the moment, there is around a 1-2 week gap between LST in the sim, and then coming to UK to do the Base check.
time between base and line training is as long as it takes you to get the rating onto your licence. So if you base check weds, get the rating thurs, and let Tom Keil know, then friday you will get a roster to start on the following monday.
It seems to be around 2 weeks between base check and line training.
Line training itself is taking about 2-3 months to complete. Upto 150 hours and 70 odd sectors seems to be the norm from what i hear.