MILAN (Reuters) -Iliad launched full-fibre broadband in Italy on Tuesday starting at 15.99 euros ($18.05) a month for existing clients as the French low-cost mobile company presses ahead with its expansion in the country’s crowded telecoms market. Benedetto Levi, head of the telecom company’s Italian operations, said subscriptions for customers who are not yet Iliad clients would cost 23.99 euros a month. Iliad’s move is set to intensify its rivalry with former phone monopoly Telecom Italia (TIM), which is weighed down by debt and under pressure to upgrade its broadband network to meet Italy’s…