Hi
For a basic oven thermometer I recommend this one:-
[link]
It will do the job and at a bargain price.
If you want to spend a little more and gain some extra functions, then I recommend this one:-
[link]
The one above has an oven temperature function that will take the highest and the lowest temperature readings of the cycle and give you a mean figure on the digital display screen.
You can also use it to monitor the temperature of foods as they cook in the oven - the probe is inserted into the food to be cooked and is linked to the main sensor by a thin metal braid. It also has an alarm that you can set so that it lets you know when the internal temperature of the meat has reached the desired temperature.
It can also be used as a general timer.
Unfortunately, it doesn't pick up radio one! ;-)
Try Lakeland's muffin cases and if you are not entirely satisfied they will give you a full refund.
[link]
BTW, my previous probe thermometer, which was a simplified version of the above but a different make, went kaput after three years of regular use, and when I emailed Lakeland's to inquire if they still sold them, not only did they reply straight away and apologise saying that they no longer kept that model, they gave me a full refund on the three year-old thermometer!
Not surprisingly, I then went along to my local branch and bought a new one, being the model I have recommended to you.
Hope that helps. 