Jannercornwall

Hi all . My 2007 plate 1.4 tdi Roomster with the 3 pot diesel hasstarted giving me some issues . It is very slow to start lately and requires a lot of winding over . I have replaced the fuel filter, Just fitted new glow plugs and still no better . I have checked the fuel lines are tight so not drawing air also . When cold it really is a long wind to get it started and the starter sounds sluggish, once warm it starts better , but doing several start attempts once warm results in one not starting followed by starting better . I am not hearing the squish sound from the tank pump when the ignition is turned on like I used to but can here it is working . Having spent a few pounds lately to cure the problem does anyone have any other ideas please . btw !! The cam sensor was replaced two years ago . The car has 102k miles and has been re mapped and once going pulls like the proverbial train. Thanks Jon