By Lars Mucklejohn The UK is more than a century away from achieving parity between male and female FTSE 100 chiefs, according to new research, as Britain lags behind its international peers. Using current appointment trends across 12 stock indexes, advisory firm Russell Reynolds Associates projected it would take 81 years to reach global gender parity among top bosses, with 87 per cent of CEO appointments going to men in 2023. The FTSE 100 is set to take 117 years to reach gender balance, compared to 59 years for the US’ benchmark S&P 500, according to the study. It added that France’s Cac 40…