I want to know what typeface is this.

Please read the rules and FAQ for posting type ID requests here, and update your post accordingly....

Having looked at this i suspect it could one of several different fonts modified to create the logo...

 

 

I think Greg Yerbury is correct the logo is an original crafted piece modified or influenced (a better word) from: Serials Dragon Bold and a version of Perpetua, with some other nuances thrown in. Any good creative director is going to attempt to create an original piece for a logo, especially for a brand as well known as Quality Street.

More details (also see discussion):

https://www.behance.net/gallery/49311935/Quality-Street