I agree with what the rest have said. Travel agents or SQ tend NOT to have deals at that time as demand is VERY high. Tickets for LHR-SIN return is about GBP700 (before Christmas) and GBP600 (after Christmas) and GBP550 (after 1 Jan) without taxes. Book now before it is too late. Any special offers are only valid after 15 Jan. Check out www.leestravel.com. They have the best deals ex-LHR for SE Asian and Middle East airlines IMHO.