By Laura McGuire Almost everyone in London knows someone who has a horror story about the capital’s rental market. Since the pandemic, demand has skyrocketed, and so have costs. However, according to the latest data from the property portal Zoola, the market could be about to turn a corner. According to the data, the rate at which London rental costs are rising slowed in April, but tenants are still paying an average of £2,112 to landlords each month. Rental inflation, the rate at which prices are rising, has cooled to 3.7 per cent compared to 13.1 per cent in the prior year period. Richard Do…