By Laura McGuire The average price of rent in London has hit a record high of £2,631 per month, and is forecast to grow by three per cent more this year, a new report has found, but the market may hit an “affordability ceiling”. However, the study by property portal Rightmove said that this is just four pounds higher than the previous quarter, as the yearly increase of rents in London halves from 12 per cent last quarter, to six per cent now. Tim Bannister, director of property science at Rightmove, said: “The trend of rent growth gradually slowing continues, with an improvement in the supply …