Then maybe do something of a "master plan" for the next year and see if you could leverage more out of an RTW ticket. If you start in CAI and visit Asia and North America, you could stop over back in the UK and still have a trip within Europe left. Or use some Avios and pop down to Joburg or Cape Town and start from there; a DONE4 is under £3K; you could go CPT-JNB-HKG-CTS-NRT-HNL-LAX-SFO...LHR, stop over at home for months and have two separate trips within Europe to take before returning to Africa.