* Miners, energy firms draw strength from commodities rally

* Insurers in demand on takeover speculation

* 1700 GMT deadline looms for Kraft's Cadbury bid

By Harpreet Bhal

LONDON, Nov 9 (Reuters) - A rally in miners and oil stocks lifted Britain's top shares 1.4 percent by midday on Monday, buoyed by rising commodity prices as risk appetite heightened on the back of the G20's pledge to keep stimulus in place.

At 1201 GMT, the FTSE 100 .FTSE was up 73.43 points at 5,216.15, extending gains from last week when the index posted its best weekly gain in a month.

Mining stocks dominated the blue-chip gainers list, with Kazakhmys (KAZ.L: Quote, Profile, Research), Antofagasta (ANTO.L: Quote, Profile, Research), Rio Tinto (RIO.L: Quote, Profile, Research) and Fresnillo (FRES.L: Quote, Profile, Research) up 3.6 to 5.3 percent.

Metals prices rose and gold XAU= hit a fresh lifetime high while the dollar retreated, as investors took on more risky positions.