The reliable way to hire a tradesperson

What would the best flooring be for extension 1.8mx3.2m that will house a downstairs toilet and be somewhere where wet muddy dogs are dried off before going into house? It will get a lot of use as it's the only door used in/out of house. It needs to be tough, waterproof and able to withstand dogs claws. I was originally going to get it tiled but several people have said to look for an alternative as the grout will get too dirty. The more I look into different types of flooring the more confused I get. Thank you in advance to everyone who replies

Can an electrician handle a consumer unit replacement, new lighting and extra sockets, or will I need other trades? I have an older fuse box in my kitchen and pendant lights throughout my ground-floor flat. I’d like to replace the fuse box with a modern consumer unit, add sockets around the property, and install downlights in all rooms, possibly with LED lighting around the ceiling edges. There is another flat above mine. Would an electrician normally manage the whole job, including any requirements for downlights in the ceiling between the flats? Would I also need a plasterer or another tradesperson to alter the ceilings, conceal wiring and make good afterwards? What checks should the electrician carry out before quoting, and what certificates or approvals should I expect when the work is complete?

Hi Can I put a washing in a airing cupboard? Cupboard has an electric water heater as there is no gas in building. Kitchen has no space for a machine.