Sorting out stuff for the tip and I notice a chip that looks like maybe an EEPROM or something inside the old alarm system box. The little blue sticker makes me think it's firmware or similar and the date is the same year the house was built (or at least, sold to its first owner), 1989. (On the other hand, do EEPROMs have that many pins - maybe it's a CPU? I have no idea.) Is this something anyone would be interested in dumping and archiving? I don't have the knowledge, equipment or, frankly, interest, time or energy to get into this myself but if anyone else in the UK is I could post the chip to you.