Ah good old Kryten.
He really has grown as a character, hasn't he.
Spare Head Two and Lister nicking Kryten's body and turning off the Behaviour Protocols in Tikka to Ride (Xtended): "That's not chicken, sir... it's that man we found!... it seemed such a waste to just leave him lying there when he'd barbecue so beautifully".
I'm surprise that Kryten didn't have any fail safes to prevent such tampering.
Look at Kryten compared to the contemporary to Lister humanoid androids we see, the bellhops in Stasis Leak, shows how far ahead he is.
Well, he does come from a later time, remember.
Kryten's home era is at least several hundred years after the Red Dwarf fled the solar system.
There would be records as to how human history viewed the loss of the ship.
Holly would have sent a message to Space Corps HQ on Earth when the accident happened, surely?
Assuming Holly got the message in the first place. Perhaps RD was out of range.