Thanks bunch for the answers all!
My commute will be around an 1 hour to a shirt+tie office (FML) by bike and I'd be especially keen to avoid public transport what with ya know and costs.
Fortunately working from home for now, but will try out a couple of your suggestions - main key is probably keeping the feet from getting wet whilst being easy to change out of too.
Seems like a couple bibs would be needed.
Pretty much only wear trainers, so may need to invest in cycling shoes to be able to use a decent overshoe - overshoes I've seen for trainers in shops look massive and kinda too baggy for my liking.
Definitely would be keen on not having to expose my genitalia getting changed in an office environment regardless of what the new normal in these uncertain and unprecedented times may hold.