[BNE] who installs alarms imobilisers & what locks 2 use?

[4th]

ive seen some suspicious vans around & i dont like leaving my bike out when i go out so am getting paranoid because when people get out of work thefts go through the roof, does chris rogers do bikes? (audio express) otherwise who installs alarms imobilisers & what locks, chains & landmines do you recommend for portable & leave at home but still bolt down?