I know nothing of the specific LAC/Barton issue.
However, having been a landlord, kicking a business tenant out by serving a months notice is not the way to go. The tenant can claim all sorts of 'business squatters rights' and it all gets very public (and expensive) way before eviction date.
The sensible way to actually start getting rid of a tenant for non-payment of rent is to send the bailiffs round with a big padlock 21 days after the due date for rent payment. Any discussion with the tenant about the late/non-payment of rent during that 21 day period implies negotiation and brings continued tenants rights.
I'm guessing we're only getting a bit of the true story as far as LAC is concerned.