• Swap control and caps lock
• Swap “ and @

If you're British and work outside the UK but in a partly English-speaking environment, there's a good chance you'll end up splitting your time between British and American keyboards. The most noticeable annoyance involved is that the British keyboard reverses ” and @. If you're able to touchtype all symbols then you may prefer just to use a US keymap everywhere. If you're not, you will probably want a British-ish keymap for use on British keyboards, so that you can find symbols like \ | # ~ ` ¬ that differ between the maps. You probably don't want to use a British keymap on a US keyboard, because it doesn't have enough keys so you will lose access to symbols that are important, at the least, to programmers.

One solution is to use an alternative British keymap that reverses “ and @ on British keyboards and a standard US layout on American ones. Some symbols will be in different places, but the location of these keys varies between physical keyboards anyhow, and they will at least be labelled correctly. A side-benefit is that most people prefer the US location of ” on the home row.

Keyboard maps in X are configured in /etc/X11/xkb. Each locale has a single file in /etc/X11/xkb/symbols which contains details of all variants for that locale (often an international version with deadkeys and a dvorak variant). They're defined relative to some other layout (ie “start with the standard US keyboard then make the following changes…”).

Here is a version of the gb layout that includes a “hybrid” variant that swaps “ and @ back to their US positions (to overwrite /etc/X11/xkb/rules/gb – the extension needs to be deleted first). Then various config files need to be updated in order to be able to select this variant through the standard KDE system settings. These need to be overwritten in /etc/X11/xkb/rules:

• base.lst
• base.xml
• evdev.lst
• evdev.xml