Analysts at Barclays have said a de-rating of UK pub stocks is "very likely" after MPs voted to scrap the 'beer tie', meaning that tenants are now allowed an independent rent review and will be able to buy beer on the open market."If this passes through the House of Lords and becomes law, this could have a material impact on the tenanted pub companies, Enterprise Inns and Punch Taverns," Barclays said.Analysts at broker Liberum have cut their rating for engineering group IMI from 'buy' to 'hold' on the back of a "challenging near-term outlook" with organic growth slowing down.They predict that the stock will "tread water" in the near term and have slashed their target for the shares from 1,650p to 1,350p.National Grid shares were given a small boost on Wednesday after analysts at Deutsche Bank lifted their recommendation for the utility stock from 'sell' to 'hold'."Falling bond yields and excellent UK operational performance have convinced us that National Grid shares will continue to trade at a record premium to its regulatory asset base (RAB) for the foreseeable future," the bank said.