LONDON (Reuters) - Lloyd's of London reported a 2.5 billion pounds pre-tax profit for 2019 on Thursday thanks to tighter underwriting and robust investment returns, and said it stood ready to support customers and partners impacted by coronavirus.The 330-year-old insurance market, which reports aggregate result figures of its syndicate members, said its solvency ratio - a key measure of balance sheet strength - was 205%, despite the high degree of turbulence in financial markets in recent..