It's probably worth it to throw the orchestras under the proverbial bus to safeguard the rights and well-beings of all workers. If the UK Parliament wants to pass a low to orchestra musicians, ride-share drivers, and/or other "gig workers" differently, they can pass new laws to that effect, somewhat like what California has done with "Prop 22."
Also wonder if things might have been different if the UK is still part of the EU.