This is the provider I'd use if I had the choice:
Results within 3 days – the fastest hair strand drug test service in the UK. Detect virtually all substances, between 7 days and 6 months after their use.
www.cansfordlabs.co.uk
I have experience of hair strand test, mine was instructed by the other side. They posed the question in a way that made the report favour them: "is the subject a chronic excessive drinker?". My test came back as consistent with abstinence, but that was not the question they were asked to address. As a result, I needed to research in depth what the result meant and be ready to demonstrate information glossed over in their report. My result was below detectable value, but this only came out by research.
Answer offered in the report was along the lines of: "on the basis of evidence, which can never be conclusive, it is most likely that the subject is not a chronic excessive drinker". B****rds didn't even mention that my result was the same as a tee-totaller would get.
So, choose the right question! Also, toxicology is only one indicator. A proper assessment relies on engagement in support from an alcohol service. I self-referred to my local alcohol service, did their dependency and risk assessment, attended key work sessions, and brought all of this to the hearing as well.
It is worth paying the extra £150-£250 for an expert report. Don't be shy about getting on the phone to these labs and asking whatever questions you want an answer to. As a prospective customer, you do not need to give an identity. If they ask for one, you can use your imagination.
If you are concerned about the result you might get, no need to rush.
What exactly does the order say about type of test and deadline?