The Mordaunt Short 902i has a minimum power rating of 15watts.
http://www.mordauntshort.com/specifications.php?PID=47&Title=Specifications
Frequency response (Hz) ... 55-22k
Sensitivity ... ... ... ... ... ... 89db
Nominal impedance ... ... ... 4-8Ω
Power rating ... ... ... ... 15-100watts
That means it is unlikely that your TV will be able to drive them directly. But it means that virtually any external amp will be able to drive them.
Also, you said £100, but you didn't say whether that was Each or a Pair. For now I think we are assuming it means a pair.
Mordaunt Short have generally positive reviews, and those here who have them seem to really like them.
Other speakers with generally positive reviews -
Wharfedale Diamond 9 ( £89/pair)
http://www.superfi.co.uk/index.cfm/page/moreinfo.cfm/Product_ID/2196
Power handling (watts):... 15 - 75w
Sensitivity (dB): ... 86
Nominal impedance (ohms): ... 6
Magnetically shielded? ... Yes
W x H x D (mm): ... 145 x 236 x 165
Frequency response (Hz): ... 60 - 24,000
Warfedale Diamond 9.1 ( £129/pair)
http://www.superfi.co.uk/index.cfm/page/moreinfo.cfm/Product_ID/2197
Power handling (watts): ... 20 - 100 (programme)
Sensitivity (dB): ... 86
Nominal impedance (ohms): ... 6
Magnetically shielded? Yes
W x H x D (mm): ... 194 x 296 x 278
Frequency response (Hz): ... 50 - 24,000
Q Acoustic 1010 ( £89/pair)
http://www.superfi.co.uk/index.cfm/page/moreinfo.cfm/Product_ID/2842
Recommended amp power (watts): ... 25 - 75
Sensitivity (dB): ... 88
Nominal impedance (ohms): ... 6
Magnetically shielded? ... Yes
W x H x D (mm): ... 175 x 250 x 265
Frequency response (Hz): ... 65 - 20,000
Keep in mind that I'm only mentioning these because they seem to have good consumer reviews, I've not tested them personally.
The Mordaunt Shorts on the other hand, as near as I am able to determine, are £99/each. But again, I've never heard anything against them. Those here who have them seem to really like them.
That's one thing that has alway irked me, sites not making it clear whether the stated price is Each or a Pair.
If you are looking for speakers to connect directly to you TV, then you need to find ported/bass_reflex speakers that don't have a minimum power rating.
Don't know if the helps, but there it is.
Steve/BlueWizard