Scum
The 3rd party excuse does not wash - it was a TT decision to outsource for shoddy service cost cutting, thus they are fully culpable, as outsourcing does not magically remove your responsibility.
e.g. say I was looking for a company to provide physical overnight security of a warehouse & I, performing lacklustre checks, gave it to a cheap bidder. Warehouse later robbed. Turns out the security night watchman **was a deaf, blind, quadriplegic * - then it would be my responsibility for inadequate vetting of the 3rd party.
* No offence to people with severe disabilities (blind in one eye myself!), just an example of inappropriate characteristics fir a night "watchman"**.
** Yes, either sex could do the job, just using the common usage term.
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