Just waitlisted for a business class saver award flight for 1 passenger from SYD-LHR for late next April.

Although not an exact science, expert flyer reports only 5 seats allocated for the SYD-SIN sector and 3 seats allocated SIN-LHR.

People refer to doing a "chaser" with SIA which I presume means calling up the SIA call centre and try & get the waitlist cleared. Just wondering how far ahead of the departure date I should try this.