By Charlie Conchie The London Stock Exchange has defended its deregulation drive today after a top pension group sounded the alarm over the lobbying activities of a City taskforce led by the exchange’s chief executive Julia Hoggett. In a letter to London Stock Exchange-owner LSEG last week, the Local Authority Pension Fund Forum (LAPFF), which represents £350bn of pension cash and is collectively the biggest holders of UK shares, said it was “very concerned” about the efforts of the Capital Markets Industry Taskforce (CMIT), led by Hogett. The taskforce, which counts city bigwigs like Schroder…