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* FTSE 100 up 0.4%, FTSE 250 up 0.2%
* Miners biggest support to main index
* Ted Baker on track for worst day on record
* Quiz slumps after earnings drop
June 11 (Reuters) - London's main stock index extended gains on Tuesday as signs of more government spending in China to boost the economy drove shares in FTSE miners including Rio Tinto RIO.L , and BHP BHPB.L 2-3% higher.
Shares in Antofagasta ANTO.L , Glencore GLEN.L were also up and oil majors BP BP.L and Shell RDSa.L gained on the back of a rise in crude spurred by expectations that OPEC and its allies will keep withholding supply. O/R
Countering that was the latest sign of trouble on Britain's high street, with fashion retailer Ted Baker shares down nearly one-third to a 6-1/2 year low after warning profits would come in well below analysts' expectations. FTSE 100 index .FTSE , buoyed in the past week by hopes of more monetary and fiscal stimulus globally, was 0.4% higher by 0715 GMT, gaining for the seventh straight session, while the midcap index .FTMC was up 0.2%.
The mining index .FTNMX1770 jumped 2%, its best one-day rise in a month, as copper prices extended gains on expectations China's appetite for the commodity could grow.
Fast-fashion retailer Quiz QUIZ.L also fell 9% after it reported a 94% slump in underlying pretax profit.