By Jack Barnett London’s FTSE 100 was dogged down today by retail tycoon Mike Ashley’s Frasers Group sinking to the bottom of the index. The collection of the capital’s top companies dropped 0.23 per cent to 7,472.17 points, while the domestically-focused mid-cap FTSE 250 index, which is more aligned with the health of the UK economy, fell 0.56 per cent to 18,824.01 points. In results out today, Frasers missed revenue expectations and warned the outlook for its collection of fashion firms was uncertain due to fears of a spending pull back amid the cost of living crunch. That warning sent its s…