Profit warnings in the morning from retailer Carpetright and funeral services provider Dignity reverberated across the retail sector and underscored the challenges facing British companies that suffer most when household finances are tight.

The FTSE 100 <.FTSE> rose 0.4 percent. It was down 0.8 percent on the week, its first week of losses in seven, after a stellar start to the year riding the wave of rising global equities.

Consumer staples companies whose profits are seen as less volatile to swings in consumer demand such as Unilever (>> Unilever) and cigarette maker BAT (>> British American Tobacco) helped pull the index to a higher close.

A report showed British shop sales slid by much more than expected in December. That capped the weakest year for retail since 2013 as consumers squeezed by high inflation continued to keep a tight grip on spending.

"This certainly ties in to much of what we have seen this year," said Colin McLean, managing director at SVM Asset Management. "In the past, demand has been quite stable and now it's just a bit more fluid."

Consumers' changing tastes and disruption by online businesses were putting pressure on the high street retailers, McLean said.

Britain's biggest flooring retailer, Carpetright (>> Carpetright plc) sank to a record low, slumping 39 percent after warning that profits would miss expectations. Sales in the core flooring category fell 7.1 percent in the post-Christmas period.

Crematorium operator Dignity (>> Dignity Plc) sank 50 percent after warning on 2018 profit. A price battle forced it to cut funeral prices by about a quarter to preserve market share.

Home improvement retailer Kingfisher (>> Kingfisher) fell 2.3 as traders read across to other retail names. Dixons Carphone (>> Dixons Carphone) fell 3.6 percent and small-cap DFS Furniture (>> DFS Furniture PLC) fell 4 percent.

The UK's general retail index <.FTNMX5370> fell 2 percent.

"Lots of the retailers are quite high risk -- businesses which used to be quite solid are finding customer activity going down," said SVM's McLean.

"Quite a few, even if they are not showing high debt, have lots of leases and other rigidities in their balance sheet that make it difficult to unscramble," he added.

Among other notable movers, EasyJet (>> easyJet) rose to the top of the blue-chip index, up 4.7 percent, after an upgrade from Morgan Stanley analysts, citing consolidation in the short-haul airline industry and a strong euro-sterling exchange rate as supportive factors.

(Graphic for Retail sector reels from profit warnings, click http://reut.rs/2DRmVY0)

(Reporting by Helen Reid; editing by Tom Pfeiffer)

By Helen Reid