If it bump starts but wont start from the motor, then its either the wiring to the solenoid (ruled out if clicking), the solenoid (doubtful if clicking), the wiring to the starter (as described above - unlikely but possible) or (very likely) the starter motor itself
Plenty of folk breaking these engines on Facebook and/or eBay, or you can get a reconditioned one from plenty of motorfactors from the £60-120 mark depending on brand