In reply to Jimbo W:
Do some maths. I don't know when in 2005 you bought this but let's say it was at the start of 2005 i.e. 7.9 years ago. You have done 155k miles in that time so your annual mileage is 19.6k. You have £1500. Will these repairs come in at less than £1500? Does this type of Civic typically run to much more than 200k miles (search Honda forums etc).
I am not in the know but have had to make similar decisions a few times, and though it's bee a bit guy wrenching a couple of times, the right decision has always been to bin it. My eco conscience is assuaged by the notion that I either HAVE run the thing into the ground, or that a smart buyer will fix it up and make it a runner.
My instinct is that a 1.4l engine is not built to last much longer than what you have, so you could splash out on the suspension only to have the head gasket or timing belt or something simply kill the engine outright in February. I've had suspension done on a 1.6 Polo Saloon a fair few years back, it was about £300 (front only). Live with the rust. Live with the non-operating central locking. But worry about the clutch, clutch plate, gearbox, engine, exhaust...
I bought a 2000 Vectra 1.8LS for £675 in June with 124k on the clock, it needed two new tyres almost immediately (I knew this when buying) so that was £130, and the back box went (£120) plus needed some rewiring on an injector that had been poorly fixed prior to sale (£62). So, less than a grand and I have a 70k mileage "head start" and a few things all spick and span. I'll run this one into the ground as usual, I think! But that should be some food for thought, I hope (getting 37-39 mpg, same as on my previous 1.4 Astra despite the bigger engine and bigger car!)