wat is your class of hon? and which uk uni? better or worse than local uni? if worse, than the chance of getting a job related to life sci will be difficult. There are already tons of life sci grad from local uni that have difficulties getting a relevant job.

anyway, why dont you consider building ur career overseas.. life sci, especially in research, is quite dead in Singapore.

Another alternative is to find a company/government org to sponsor ur phd and get bonded.