I have sorted it. It appears that I hadnt seated the diaphragm washer correctly, or when I screwed the bit in it moved it. I have seated it correctly now and it appears to be working.
Apologies and thanks for taking the time to look
Hi Guys
I recently had a problem with my toilet filling up v slowly. I did some research and found out the diaphragm washer had split and that was the cause (or most likley).
I ordered the part off the net and in the meantime I used the isolation valvue on the toilet to stop it from...