Canary islands mega tsunami

[Tonka]

Having the sea a few yards from my front door, means I like to keep an eye on risks like this. I didn't see the documentary this time, but I saw one that sounds pretty much the same years back.
I live on the edge of a harbour, and we were hit by a small tsunami after a mild quake in the Solent. It was only two meters but I saw it hit the sea defenses at the harbour mouth and it was quite spectacular. By the time it reached me across the harbour it wasn't big enough to even call a wave... more an arrogant ripple. I doubt a 25 meter wave would be so easily perturbed though. Now I've survived a barrage of 20 foot waves, when a storm hit the Canary islands once (none of the islands exploded though). The airport got flooded so I couldn't get home, but that was a good thing. But 25 meters is a whole different kettle of ball games!
Anyone know what size the wave is predicted to be once it gets squeezed down the English Channel?