Just a word of warning. The socket as mentioned in the other thread is for low wattage items such as phones and laptop chargers. Adapting this for 13A style 3 pin plugs is not without risk. The reason the socket is 2 pin is due to it being specifically designed for double insulated items ( as there is no earth connection). Therefore it is possible with a 3 pin uk socket attached to a flying lead plugged into the inverter socket you could plug in non double insulted appliances making the metalwork live in the event of a fault. Now the risk is low as these type of appliances/products are less prevalent now, and certainly very rare rated at 150w but people overload there sockets all the time and will try and plug all sorts into it.
Obviously our continental cousins thought of this by designing the plug and socket specifically for double insulated products and these plugs come as standard on their items. So just think on before plugging your whatever into it. If the 3 pin plug has a plastic earth pin it will be fine as long as it below 150w rated. If the plug has a metal earth pin and the earth is connected to it there is a risk however low. Sorry if this sounds like scare mongering and there does need to be a fault with you electrical item before it becomes an issue but I felt I needed to point this out.