The hairdresser problem has taken hours of research, should really have got it sorted sooner, but commercial Landlord and Tenant wasn't covered in any great detail when I did LLB, so I had to do a crash course in business leases before even attempting to sort hairdresser's problem out. Finally came across a very recent case which may well prove to be extremely helpful.
The Royal Institute of Chartered Surveyors (RICS) offer a mediation service for business tenants with problems, I've recommended that my hairdresser gets in touch with them to see if there is possibility for negotiation with the landlord. The ruling in the case I mentioned may prove to be a useful bargaining tool against the landlord and may also, if nothing else, save me from the bubble perm.
Seems a bit unfair that residential tenants can take their claims to tribunal (the LVT), but there is no such facility (that I'm aware of) for business tenants, who of course experience just as many leasehold problems as 'dwellers'. It's the small businesses that struggle to find legal help, because any sort of litigation is often too expensive for them to contemplate.