AU1 Boot not releasing!

[AU Gold]

Went to open the boot this morning, and both remote button and dash switch won't open the boot, ended up dropping the back seat to pull the wire to release it.

The lights flash, remote lights up and i can hear the dash switch click, but no go.

I know there's been a few threads on here before about this problem, so just asking to see if anyone knows how much a new solenoid is likely to cost, and are they an easy fit for someone with limited skills! :

Sorry for no avatar etc, still a newbie to the forum.

Thanks all _2: