any reason why this trigger wont lay at high odds,say 600-1?
Do you have funds of £29,950? If not it won't place a £50 bet on a 600-1 selection. You need to have enough money to cover the liability.
Liability of a £50 lay on 600-1 selection = (600 - 1) = 599 * £50 = £29,950
If you have the funds then maybe the selction wasn't at 600-1 long enough for your bet to be matched?
Hope this is helpful for you.
Whitey