As I recall the offical phraselogy is to ask for MATZ penetration at the opening call. My 2 local MATZ's also offer LARS and so they tend to be more intererested in the usual CARPACER type of call (as you would expect).
In recent years I've either had the full 'pass your details' or 'permission denied, cleared to transit at or above 3000,, which is to put it mildly bull*hit!
Out of the recent transits probably only 20% have had the expected response - 'G-**** you are cleared MATZ penetration...'
It is the way it is! A couple of times I've been unable to make 3000' feet and said I am tranisting the MATZ after clearance has been refused. If they had quick response fighters the controller would have fired them up! However a single Bulldog aerobatting over the aerodrome does not actually require all that much space..... Let alone motogliders....
The bottom line is that MATZ have a lower level of protection (for good justification). Approach one when its close to lunch or teatime and expect grey machines at high speeds. For the majority of the rest of the time they are quiet places. Remind the controller of your MATZ penetration request and carry on if they do not respond. Radio is supposed to be an aid - so tell them what you want, if they don't give it - tell they what you're doing (you are after all entitled to do it..).
To be fair the local units are quite good, but MATZ transit at 3000'?????
Aviate and then communicate. If you tell them what you are going to do then everyone is aware. If you don't but transit anyway then radar and the rest will enable them to sort it out - but far better you just tell them. And do critically remember that while MATZ penetration is OK without permission ATZ is NOT.
If they are recovering 6 Jaguars I'm more than happy to give them space. If they are reading the Sunday Mail - I'm transiting!