By Ali Lyon Ofwat, the UK’s water regulator, has set out a record £88bn spending package that would see Londoners’ bills go up by an average of £99 in the next five years, excluding inflation. The long-awaited investment plan, which followed a lengthy period of negotiations between struggling water firms and the regulator, proposed a total investment of £88bn in Britain’s creaking sewage infrastructure to reduce pollution and improve customer service. This would represent a threefold hike on the amount earmarked for the 2020-2025 period. Of the total, Ofwat said £35bn would be earmarked for pr…