Halfords said continuing capacity constraints in the global cycling supply chain led to low availability of bikes throughout the period, especially in the Adult Mechanical category, which contributed to materially lower growth rates towards the end of the 20-week period to 20 August. The autocentres business achieved total revenue growth of 86.2% and like-for-like growth 15.5% on a two-year basis, driven by increased scale, improved utilisation and focus on B2B. However, the supply of technicians to garages and Halfords Mobile Expert Vans was hit by recruitment challenges and Covid-related absences, which impacted sales, the group said.