By Amber Murray Uncertainty around the Autumn budget is holding back consumer confidence, Halfords warned today. This morning the retailer said group like-for-like sales ticked down by one per cent in the 26 weeks to 27 September, on strong prior-year comparatives of 8.3 per cent growth plus a wet spring. The company is on track to deliver £30m of savings to mitigate inflation of £35m. Autocentre sales, which represent about 40 per cent of the company’s revenue, rose by 0.8 per cent year on year. The group said tyre sales were particularly challenging, with “price-conscious customers trading d…