How can you remove mould from the sealant arround a shower tray?

better removing the sealant and reapply new anti-mould silicone

remove the sealant and replace.

Remove the old silicone with a stanley blade and thoroughly dry with hair drier and re-silicone with high quality sanitary silicone,such as dow corning,or microband sanitary silicone. when you have done this my advice is to dry the shower out with an old towel every time you use it,as lying water creates bacteria! black spores! kieran