I would strongly caution against Green Granite's suggestion without further investigation into (a) loads you are placing on your ups, and
Sorry
Mixture, I don't understand your reasoning, the whole point of having the ups output as IEC sockets, other than to stop the cleaner plugging the vac into it, was so that you had unique power leads for the computer and the monitor and nothing else got plugged into it, you would need a 13 amp skt to plug the router psu into. All other peripheries should be powered from the raw mains.