Allison Kirkby, the chief executive, has been attempting to turn around BT’s fortunes - Pau Barrena/Bloomberg Finance BT is to spend tens of millions of pounds attempting to restore its brand this summer as the company tries to realise its growth ambitions. The former state monopoly will revive the BT Mobile brand alongside a major advertising campaign with the slogan “brilliant things”. It marks a crucial milestone in the efforts of Allison Kirkby, the chief executive, to restore the BT brand to promin ...