40 UK MPs havewritten to the UK's telecoms regulator, Ofcom, to ensure it keeps a close check on the four mobile network operators, as they fulfill their obligations to increase mobile network coverage in rural areas. The MNO's plan for 90% geographic coverage on their 4G networks will require the installation of around 500 new masts which will be located in sparsely populated areas and not likely generate great financial benefit for the level of investment. The Parliamentary group has asked Ofcom to review the deployment of the new masts before the scheduled date in 2024.