I'm brewing my second Cooper's IPA and have run into a problem.
Brew went in last Thursday and took a little longer than usual to kick off. By Saturday it was in full flow but had picked up a distinct eggy odour which, as swmbo was away, meant it didn't end up down the sink

Just had a quick whiff of it now (post initial fermentation) and it is very noticeable. I've done a search and have seen lots of info regarding this and lager yeasts but am concerned it may be an infection.
Anybody else had their ale suffer from this? Have my ventures into alchemy led me to discovering an expensive way to produce stink bombs?
My cleaning and sanitising regime is not changed from a thin bleach soak followed by plenty of rinsing followed by a sodium met rinse.
any ideas would be greatly appreciated!