No confirmed berth can be assured !!! It usually gets into WL in 2 mins say by 08:02 hours... so unless u are the one to reach PRS at 8.00 am there is no hope....
Just tried to book tickets in LTT KCVL GR for 09.05.2014 from LTT to TCR... While making payment it was Avbl 350 n after payment I got WL 206 & 207 :(
Better try for 12223 ERS Drnt that will give u some time say upto 08:10 hrs in getting u a confirmed ticket