The FTSE opened more than 30 points higher Tuesday thanks in part to an 11% share price jump for builders' supplier Wolseley.
The FTSE100 rose in early Monday trading following strong gains in Japan.
The FTSE 100 opened more than 30 points lower Friday after the US Federal Reserve raised the rate it charges banks for emergency loans by a quarter percentage point to 0.75%.
The FTSE was flat in early trading Thursday despite a positive outlook from defence contractor BAE Systems.
The FTSE was up 27.5 points (0.5%) to 5271.63, buoyed by gains among mining firms.
The Dow Jones fell 135 points in early trading after China said it would ask banks to up reserve levels, restricting their lending capabilities.
European markets have been hit hard by news Greece will receive bailout cash to tackle its debt crisis.
London trading got off to a strong start Thursday, following positive results for Rio Tinto and rumours Aviva could be the target of a buyout bid.
Towers Watson has started recommending its clients invest up to half of their passive assets in fundamental indices.
Financials and British Airways pushed the FTSE slightly higher this morning.