Some people have first aid kits at home other don't. Whether you have or you don't is fine, you are not breaking any laws.

The same applies to cars, you can have basic first aid kit in your car (like all Mercedes owners do) or you may not have one, that is fine as well, again, in UK there is not compulsion by law to have or not to have first aid kit in your car. (In Germany and some EU countries it is compulsory that you have first aid kit in your car so when you are driving on mainland Europe, be sure to check the laws about this in the country you are visiting).

First aid kits in the workplace
As established above, first aid kits is not compulsory at home or in the office, however in the workplace its quite different, employers must not only have first aid kits but staff trained in administering first aids. The first aid kits requirement are different from industry to industry depending on the chances of staff sustaining injury in the course of their daily work and the nature of the injury most likely to occur and the number of employee a business employs.

CMS Medical - First Aids and Medical Supplies
CMS medical specialise in supplying statutory first aid kits to businesses, based in Featherstone, West Yorkshire, CMS medical is a family run business established in 1990, they specialising in supplying First Aid Kits and equipment for the sports, businesses and domestic market.

You can order you first aid kits directly from them online via their website or via telephone number whick you can find on the contact page of there website: http://www.cmsmedical.co.uk/contactus.asp