Many companies in the UK are delaying payment of their invoices as a means of bolstering their cash flow as their profits are hit by the strong pound and deteriorating economic conditions. According to the latest research carried out by Experian, the information solutions company, the average payment period across all industries has risen by 0.71 days - to 60.34 days from 59.63 days - since November 2000, when the last survey was carried out.