Note that due to the poor demolition, unsupported floor joists are now also an issue.
Debris from the demolition is also scattered around inhibiting viewing for possible termite mud workings.
This house had no active termites that I could locate, the under floor area was dry and ventilated, reducing the risk of termite activity.
The treatment chemical used was Premise, that has an active working life of 5 to 7 years and it was last sprayed in 2010 so was well overdue.
I recommended to my client that this termite treatment should be on going and to contact the last company involved, as they should also reinstate some of the brickwork.
I recommend this as I have duty of care to the purchaser.