My dad bought a damaged X reg 306 (5 door) from an auction about 6
months ago, the damage was largely superficial and had largely been
repaired.  about three months ago the car started fine, but then was
left to stand for a two months due to a build up of work for my dad.

Last week when my dad went to finish off the car, the battery had died
and now it would seem that the immobilizer (deadlock) has kicked in,
as the car will not turn over.

When we bought the car we were only given a key, i.e. no central
locking remote and so cannot turn off the immobilzer.

is there any way we can sort it out without gettin ripped off by the
peugeot garage?  We’d be greatful cause it is driving us insane