Ceiling rose and switch

[biggurs]

Hi
Dining room light stopped working so I changed the bulb and still didn't work so I changed the ceiling rose pendant. Still didnt work. So then I changed the switch (1 way) and still doesn't work.
Tried a different bulb with no luck. G24q bulb (4 prongs) , removed and flipped 180 degrees and plugged back in. Still doesn't work.
Any ideas before I call out an electrician? Thanks in advance

 

[ralpheyesight]

Have you checked if you have power. Also did you fit a switch with only two connector or one with three if so you may have got the common and l2or l1 mixed up. I’m not saying you don’t know. Also the ceiling rose no doubt a multi terminal have you got your connections correct. First see if you have power not pushed the cables in to far so they are not caught

 

[biggurs]

Have you checked if you have power. Also did you fit a switch with only two connector or one with three if so you may have got the common and l2or l1 mixed up. I’m not saying you don’t know. Also the ceiling rose no doubt a multi terminal have you got your connections correct. First see if you have power not pushed the cables in to far so they are not caught

I've attached pics. I have one of those testing pens and it beeps when I press the switch down (on) nd beeps near the top only when switch is off .
Like i said it just stopped working so I changed everything and still the same