Please can you tell me how I can leave some positive feedback about one of your technicians?
Welcome to this user forum for BT Residential phone and broadband customers.
If it was regarding a home visit or fault repair, then that would be Openreach not BT consumer.
You can give feedback on this form.
https://www.openreach.com/thank-an-engineer-form
It is appreciated.
If it was a customer agent offering help on the phone, then please post back here.
Thank you. Done.