I have been looking at cheap tablets for my Dad this week. He noticed the hudl at Tescos. It has OK reviews in the press, it seems to be value for money, no idea how long it will last, how long it will be before the battery stops storing it's charge - the batteries are not removable/replaceable like phones. I can't speak for the one you link to, I glanced at the specs, it's low power and low res - it'll probably be OK for streaming audio though a smart phone would work for that with some external speakers. It has low memory (1GB) so won't handle multitasking as well as others and it's 1GHz processor is not great either. It's storage is 8 GB so that will limit what you can save on it, though these devices are not really intended to store much so I wouldn't worry about that. This device is also running an old version of Android, this is not a problem in itself but some apps may fail to update in the future.
I have a first generation Nexus 7 which is great and my wife has a Kindle fire HD, both are not in the cheap price range but do come out better in the reviews than the cheap ones. Of the two, I prefer the Nexus because it's vanilla Android with Google Play. The Kindle (and Hudl) has a HDMI port which means it can be connected to a TV and used for Netflix, Youtube, browsing etc, thus smartening the TV. I use mine for mainly surfing (using browser or eBay, Amazon apps), email, watching video on Youtube, iPlayer, streamed from my server or downloaded mp4s and its fine for that. The reviews of the hudl say they'll be OK for these just not for hi-graphics games.
On a sub £100 budget I'd recommend you take a look at the Tesco Hudl, might too soon to know how well it will survive but if you are in no rush to buy, see what happens, we might see some discounting after Christmas.
£150-£200 I'd recommend a Nexus 7