Amaanah personal financing through HSBC is based on tawarruq via the bank (al-tawarruq al-masrafi) as is clearly stated on the bank’s website in English.
This is a haraam transaction, because it involves a trick to circumvent the rulings on riba.
The Islamic Fiqh Council has issued a statement ruling that organized tawarruq done via the bank is haraam. We have quoted the text of this statement in the answer to question no. 98124.
And Allaah knows best.