You need to do as Wuff advises - also check that there's no water coming in from above (if it's failed, it's time to think about a bathroom reno or partial reno) - if this is Ok then definately get your exhaust fan serviced or replaced (get the most efficient you can and one that can be programmed for a delayed turn-off) and then hit the entire bathroom in a bit of a cleaning frenzy. I can see that you've got sections of grout coming out - it's also worth re-grouting (horrible job) - just make sure that you remove all the grout before applying fresh grout. I find that hot water, white vinegar (equal parts) and a half a cup of rubbing alcohol with a few drops of dishwashing detergent work a treat in any space but particularly where there's any porous surfaces (make sure you use rubber gloves - it's pretty harsh on your hands) - just replenish your solution when it starts getting grubby and cold - the alcohol and vinegar kill the mould spores, and the water and dishwashing provides general washing assistance. (Bleach will take the black colouring from mould but wont kill it completely in porous surfaces such as grout so use bleach afterward if the vinegar and alcohol don't work). Make sure that you dry out the area fully - if you've got a dehumidifier now's the time to use it. Going forward, get a glass squeegee and use it to get rid of excess water after you've used your shower - also cut down on the amount of steam generated if you can. You can also make a homemade bathroom cleaner (3 parts water, 1 part rubbing alcohol, 1 part vinegar a small dash of dishwashing detergent and 15-20 drops of teatree oil) spray it down and use bicarb of soda sprinkled on a cloth to clean down your tiles, tub and grout.

Smiffy, good to hear from you, we have all been worried - Houzz wasn't the same without you. Best wishes for a speedy recovery, rest and take care of yourself. Lots of love and mush!

I have only seen one wooden bench top that has managed, over time, to keep the wet out and avoid that black mouldy creepage where the water splashes behind the taps and around tap inserts. It was built by a carpenter and then the owner applied oil to gain the colour desired before applying several coats of marine epoxy (several = at least 5), sanded back before every new layer. It was burn proof and the colour locked in by epoxy coat with no maintenance required (until a visitor put a burning pot on it and left it there while attending to fire on stove, still... only left a black ring. That said, the owner promptly got out the sander and ground back until black ring was no longer charcoal texture, then reapplied oil and layered epoxy until black ring looked like it belonged (can't do that with any other surface I can think of?). After 15 years there is no sight of the insidious black mould from water penetration so I suppose it is the same recipe as with most thing successful projects in life, research, research, preparation, preparation, preparation and don't falter at the finish line.

I will be the loan naysayer and go: Vinyl Plank timber pattern tiles. I did these in my kitchen and they helped make the room. Used Karndean, but any European brand should be fine (avoid American and assume they are using American or worse if they don't say the country of origin). http://www.karndean.com/en-au/floors/landing-pages/new-looselay-longboard?gclid=CjwKCAjwspHaBRBFEiwA0eM3kQ7eEFPH5FlK2IwV3o7ZsbbmJ19srG0OM_tWK5dhPMNyDdwxGPUr4BoCoYcQAvD_BwE Caveats: Ground must be FLAT. 100% flat, ruler FLAT. If not you will have to level. If flat, you can lay them yourself. Our floor had to be levelled and it was tough. still got a few high patches and gaps because of that. However I have done it on a concrete surface myself since and it's beautiful. Benefits: Nice and soft on the foot. (less ankle pain) single tile replacement. Looks fantastic. No PVC glue fume issues and fairly resilient. Do be wary though of metal chair legs scraping the floor. Waterproof! when installed right with no gaps! (why I would choose them in a kitchen over timber or Eeek carpet!.... Yes previous owner installed shagpile carpet in the kitchen).