The Great Escapade with Singapore Airlines - A Great Way To Fly Round The World!
£825 15 Jan to Jun/1 Sep to 30 Nov
£925 1 Jan to 14 Jan/1 Dec to 9 Dec
£925 24 Dec to 31 Dec
£990 1 Jul to 31 Aug
£1155 10 Dec to 23 Dec
London - Johannesburg - Singapore - Sydney - Christchurch - Auckland - Rarotonga - Papeete - Los Angeles - London
I assume that this route is most relevant considering you state that you live in the United Kingdom.
First Class: £4999
Raffles Class: £3199
You could be flying with 3 superior airlines, namely Singapore Airlines, Air New Zealand and Virgin Atlantic Airways.
Anyone can fly, only the best Soar.