Perhaps replace the seals and if that doesn't solve it also replace the water tank.

 

Replace the seal and check / clean the stub on the tank where it contacts the seal

Is this in a hard water area ? Looking at item on right it looks like scale. Has / does the machine need de-scaling ?

 

Thank you all for your suggestions I will investigate.

 

Hi El carajillo,

Yes very much a hrad water area but I descale whenever the machies indicates it is required.