Analysts at Peel Hunt are hoping that the solid Christmas performance from fellow retailer Next PLC ( LON:NXT ) may indicate that the high street had a more bearable Christmas, which could provide a little relief for M&S's non-food businesses. The broker has also said like-for-like food sales "could surprise on the upside" but the shares still retained little interest as M&S continued its turnaround efforts. Trading announcements: Tesco PLC ( LON:TSCO ), Marks and Spencer Group PLC ( LON:MKS ), International Consolidated Airlines Group SA ( LON:IAG ), Card Factory PLC ( LON:CARD ), Dunelm Group plc ( LON:DNLM ), Mitchells & Butlers PLC ( LON:MAB ), Nichols PLC ( LON:NICL ) Economic data: US weekly jobless claims FTSE 100 ex-dividends to knock 0.04 points off the index: AVEVA Group PLC ( LON:AVV )