UK bond yields dropped in early trading on Wednesday as Prime Minister Keir Starmer appears to have fended off a leadership challenge, with analysts citing an easing of political uncertainty. The FTSE 100 index rose 66 points, or 0.65%, to 10,331, led by mining stocks on a rise in copper prices.

The market reaction follows what The Guardian describes as a day of "Starmer drama" in Westminster. Lower gilt yields signal reduced government borrowing costs and improved investor confidence in the UK's political stability, at least for now.

The average 2-year fixed residential mortgage rate edged down to 5.74% from 5.75% yesterday, while the average 5-year rate held at 5.67%. Though the changes are marginal, any further decline in bond yields could feed through to lower household borrowing costs.

The sustainability of the rally remains uncertain. If political tensions resurface or inflation data disappoints, gilt yields could reverse course, and the mortgage rate relief may prove temporary. The City is watching closely for further developments in the leadership dynamics.