I"ve played a few of the £20 + £2 stts and yes the blinds do go up alarmingly quick. I can understand that they have to get them finished in an hour or so though because at the end of the day the place is there not for our convenience but to make money. If DTD are only taking £20 total then they are barely making anything on these tables anyway.
I believe that on the higher buy in stts the levels are a bit slower. Not certain what they are but it"s all on their site.
One thing I"ll say about the stts is that they seem a good way to make a bit of money if you are a decent player. If you can maintain your discipline while all around you are shoving in desperation when they really don"t need to then I can"t see them being difficult to cash in.
In the three that I"ve played I managed to cash twice without hardly playing a hand. They seem a bit like internet poker so just don"t get dragged in and you"ll do well.
Cash games are excellent. Plenty of options, different games and different limits so there"s bound to be something that suits you. If you"re any good at omaha then I"d recommend the £1/£2 round of each (nlhe / pl omaha) table. Main reason is that at least 50% of the players think that a decent texas hand is just as good as an omaha hand. Take their money!!!!!
Good luck on the 8th. I"ll be there as well so not too much luck though