These letters relate to very historic
collection/recovery "service failures" concerning current accounts, credit cards and loans
I have not had an account or debt with HSBC since 2008
My gut feeling is that it maybe connected to the use of their fake inhouse collectors
Payment Sevices (PSB), Metropolitan and DG Solicitory
but I will know more when they reply to my letter demanding details
I think I just have to clarify what my site team colleague said above. It's not only a question about being aware – you also must have asserted your rights within the first 30 days.
Send them an email straightaway. Refer to your short-term right to reject the vehicle under the consumer rights act and that in view of the defects which have manifested themselves, and you are asserting your right to reject and you are rejecting the vehicle and that they should make arrangements to collect it or receive it from you and to refund your money.
You must do this straightaway. Meaning tonight. Don't hang around
Even if you feel that you might want to hang onto the car, you should assert the right to reject in order to reserve your position. Once you have done that and come back to this thread and tell us more about it. In particular, who is the dealer?
Have you had on exchanges with them about this? What have they said? Where is the vehicle now and what is its condition?
In fact I see the you had the day wrong. You said it was yesterday – which was 1 December.
Assert your right to reject now – by email. You don't want to get into some kind of argument about whether it was this day or that day. Put it beyond question and assert your right now.
Then afterwards we can discuss your situation
The PDF you posted includes a reconstituted CCA sent with a letter from Barclays dated 14 January 2018. This is acceptable as evidence of a CCA under CONC 13.1.4:
(1)The copy of the executed agreement should be a 'true copy' of the original. However, as confirmed in the case of Carey v HSBC Bank plc  EWHC 3417 (QB), in this context the term 'true copy' does not necessarily mean a carbon, photocopy, microfiche copy or other exact copy of the signed agreement. There is no obligation to provide a copy which includes a copy of the signature.
(2)The firm can reconstitute a copy. It can do this by re-populating a template of the relevant agreement form with the details of the specific agreement taken from its records. If the firm does provide a reconstituted copy, it should explain that that is what it has done, to avoid misleading the customer that this is a contemporaneous copy.