First time flying with Virgin Atlantic. Would appreciate advice on the bidding process from Classic Economy to either PE or UC. We booked using 15k points and $151 cost per ticket for the flight from LAS to LHR. Since our flight leaves at 9pm we would like to try to get some sleep in a more comfortable seat. Current min bid is $845 for UC and $620 for PE. Seat map shows 11 seats left in UC and 12 seats in PE. Should I try and bid now or wait to see if we get a cash offer to upgrade closer to our departure? I am thinking bc we already booked using points we may not get lucky with a lower price to upgrade? I know either way it's a gamble!