I popped into Sainsburys yesterday and they are selling kitchen utensils at reduced prices.
They have a Slicing Helper which is a cream plastic utensil (right in the pic) which you open and put a tomato, onion or egg or whatever you need to slice, in it and then close it. It has slots both sides so you can cut left or right handed....really handy and it works and just 15p!!! Great for someone with joint problems, or the elderly .
There was a set that was reduced which is the same range as these if you want to have a look: http://www.sainsburys.co.uk/sol/shop/home_and_garden/cookware/food_preparation/tool_sets_and_utensils/107731399_tu_5_piece_utensil_set_red.html?hnav=4294966950
They are the TU soft handled range in red or black with steel-most were £2.99 ish!
and some more but I cant remember them all.