Hi! I'm french and I have a homework to do about an article from the Guardian : "Catching a train to Crewe? Call Bangalore". I just want to know what is UK plc and BT? Thanks to help me quickly and with simple words please!

Is a company which specialises in setting up companies (eg. legal structures) and provides other business startup services.

i cant help u with that cause im not french

BT is British Telecom, a telecommunications company.
I don't know what UK plc is.