Thanks for that, I have used the Scantronic 7651 (*1) with good results
which is a straightforward install with similar features but has the benefit
of:
o EOL tamper option so you know which zone has a fault

EOL tamper is nice - because tracing tamper faults on DIY installations
most typically involves "insert link in global tamper & shut the thing up" :-)

o A good sized remote steel case so plenty of room for wiring and a big
battery

Steel is also preferable.

o Full alpha (dot matrix) LCD without a door (nothing to break)

Don't slam the alarm door, slam the cutlery draw :-)))

o Lynteck Midas bell boxes where small and discrete is required

That sounds interesting.

Add...
o Visonic ceiling PIR -- wiring neatly hidden in ceiling voids, 86mm dia
o Screened alarm cable -- just seems like a very long aerial otherwise

Cross mains at 90-degrees, keep 9-inches away. However when you
have innumerable taxi masts, to aircraft UHF blasts nearby it is prudent.
Costs only about £4 more a reel and might just reduce the odd false.

Scantronic are well regarded, will take a look.
If it takes a 7Ah battery then it sounds a better option.

Thanks.
--
DB.