Re: SIDS
I am sitting at home reading this so I do not have a copy of the MATS part 1 with me (I'm not that sad!), and also, being a South Banker, I do not know the precise details of the SID (I would not work you until you were transferred to me at FL70 the other day)... however,
The sids that we have access to have a pictorial AND textual description of the SIDs i.e. you should have a rough picture of the track you are expected to follow, along with annotations of radials and, in boxes, altitudes that you have to be at by specific points.
Due to the interaction with the many other airfields in the the vicinity, you may well have a stepped climb, i.e. on the SID it may say, for instance, cross LON R075 D7 above 2000' then further on it may say Cross LON R075 D12 at 3000' (figures are all made up here as you can guess). This 'cross at' means you have to level off, and will probably be due to the fact that another SID crosses above your track.
Unfortunately, there are few different publishers of SID information, and some are better than others.
As far as follow up by the CAA goes, a lot of it depends on the controller. You say that TCAS was not triggered by your actions, so if it was fairly quiet and not a 'bad' bust, the controller may have elected not to report it (he is supposed to, but it's paperwork).
If it was reported, expect to get a letter from the CAA, but do not get unduly worried.
The best action if you have an incident is to try to contact the agency (i.e. TC in this instance) when you land and chat about it. WU would be able to get a phone number for you to get to the supervisors desk. You may well be able to talk to the controller involved and this sort of interaction is appreciated. (The controller will probably be cussing you for busting the SID, but if you get in touch, they will more than likely be placated and very reasonable).
If you fly out of WU on a ragular basis, or within the London TMA, it is worth trying to get a visit to the unit - it's fairly straight forward if you explain why you want the visit (i.e. you fly in the area and are interested in the mechanics of the airspace)