Good suggestions above…
I just did a little bit of sleuthing and I think I have determined that the Tour of Sufferlandria (ahem) training is going to be announced soon. This is a good way to get a good tour of what SYSTM has to offer, have a little fun (maybe Type 2 fun 
) and help a good charity if so inclined. This virtual Tour is a fund-raiser for the Davis Phinney Foundation if you want to participate and is a week long event from February 25th to March 2.
You might have just about enough time to squeeze in a three-week Building Block plan beforehand. I’d suggest MAP, Threshold or possibly Tempo. If the Tour Plan encroached on that plan, you can end the Building Blocks plan and start the Tour Plan.
For the Tour info watch this thread:
Post the Tour, I would suggest you might follow the Century plan in prep for your Ride London event. That would be quite a training block.
