By Jess Jones In one week’s time, Allison Kirkby will take up the mantle at the helm of Britain’s biggest telecoms company. BT’s first female boss has a strong CV. With a background in managing financial operations for large companies, she has been chief of Swedish telco giant Telia for almost four years. Kirkby has also served as a non-executive director on the board of BT for around five years, meaning she is already rather cosy with the company. But, as analysts havepreviously pointed out, the 56-year-old has a tough job ahead of her. BT is trying to streamline its operations as it continue…