Has anyone had any experience using either FHL or NoBlue for some outsourced work? (UK based question)

Have you considered trying to find an independent? There are wire a few around that would accept a temporary contract. In regards to NoBlue big no no in my dealing with customers who used them. BB1 are OK but can build things outside of the NetSuite Normal. FHL steer clear. I would however recommend CatalystIT Solutions. @NElliott can put you in touch with someone there.