I used to work a lot in Harrow, at Northwick Park
Always amazed me that when we were buying our first house for 150k 12/13 years ago, a four bed detached in Yorkshire was cheaper than a studio flat in Harrow. And I'd think, how does anybody afford to raise a family here?
Anyway, Gordon Brown abolished Boom and Bust Ric, your diagram is redundant now....
In a great misuse of percentages on the Today programme on R4 the other morning it was reported that the value of the Rouble has fallen by 100%. Which it clearly hasn't because that would mean it's now worthless.
Dead easy to change a cassette and they're not that expensive so try a couple of different ones, IIRC I've a 12-28 or similar on my Bianchi and my Ridley. I assume the times I'm likely to want the 28 are more than I would the 11 on an 11-25. In fact the 34/28 on the Bianchi is probably not that different to the 30/25 on my Sora Winter bike with a triple chainset. The only issue with a wider range is that you might get stuck between two cogs trying to get the right cadence but with modern 10 and 11 spd cassettes this is less of a problem than on 6 and 7 speeds. All my opinion of course.....
Outlaw is pretty flat, Oxton Bank is as steep as it gets, I'm sh*t on hills and got up it no problems. Get the right bike, the right fit is way more important and will.have a greater impact on time over an iron distance than the gear ratio, personally I'd go with a compact or semi compact and worry about the cassette later.
I have a Ridley Noah that I bought three weeks before Outlaw this year, I really like it. It has a semi compact Rotor chainset though. In my opinion the top end B'Twin bikes are good value, the Ultra 920 comes with Ultegra and Kysrium Elite S for 2 grand and weighs less than 7.5kg IIRC.