SQ Online Check-in on VS codeshare question

Hi all,
Flying out on SQ317 on Thursday, just tried to do online checkin (48 hours before) and failed. Phoned SQ and they said call VS as it's a VS codeshare ticket. VS said online only opens 24 hours before on the VS website and it may or may not work for codeshares!
Can anyone shed any light on whether the VS online checkin will work tomorrow or whether I need to be at LHR extra early on Thursday to get a decent seat?
Thanks in advance
Flying out on SQ317 on Thursday, just tried to do online checkin (48 hours before) and failed. Phoned SQ and they said call VS as it's a VS codeshare ticket. VS said online only opens 24 hours before on the VS website and it may or may not work for codeshares!
Can anyone shed any light on whether the VS online checkin will work tomorrow or whether I need to be at LHR extra early on Thursday to get a decent seat?
Thanks in advance