Good afternoon, I purchased a 25mtr coil of PRYSMIAN 6242Y 2022 GREY 2.5MM² TWIN & EARTH CABLE in Screwfix at the start of July and found while trying to strip this cable using CK strippers, they parted the outside insulation but I could see that the grey insulation had not slipped up away from the Brown, Blue and earth wire,I then tried to use a knife to slice the outer insulation and use the earth cable to rip it I found it very hard to do this, once I managed to do this I couldn't peal the outer insulation off the live and neutral conductors. Yesterday I purchased another coil and found it was just the same.I had a piece of the same cable made in 2021 and found it stripped ok. Practically this is a problem which can be overcome but I wonder will this cause problems over durability? I have contacted Prysmian but have not got a reply as yet.