Barclays has been named as the most complained about firm in the first half, according to data from the Financial Conduct Authority.It had 370,733 complaints in the first half, down 12% from the previous half.Lloyds TSB was the second most complained about financial services firm with 253,735 complaints, a decline of 38% from 349,386 in the last half. The news comes as Barclays grapples a £5.8bn rights issue and an investigation into a 2008 capital raising in Qatar. RD