You may not be aware that the Thames Valley Police Training centre at Sulhamstead is less than a mile away from the crime scene.
If you were to drop them a line via the website, and depending on numbers and what day of the week (although events are also held at weekends) they may open the cafeteria and lay on some refreshment for you given what the run is in aid of.
In the past when I was serving (post Hungerford) I would meet groups for the same reason (although Hungerford is much further away) and give them a tour of the workshops and show off some of the different vehicles we used just to make a day of it.
As I say, may be worth asking the question.
The crime scene is also Only 50 yards from the scene of the train crash in 2004 (which some of you may recall) where 7 people died and many more were injured when a car parked itself on the level crossing derailing the HST125 (which has now been replaced by a bridge) so the location to us locals and those of us that served has quite a significance.