LInka model building system (Leighton Buzzard LU7)

It's a model building system for creating HO/OO buildings for say model railways. You mix up some plaster which you pour into rubber moulds. It looks a bit involved and I should imagine the end results are a bit fragile and of course messy. I bought it at a car boot sale 30 odd years ago and never used it. It has been used and I can't guarantee all the bits are there and the plaster is usable. Note I follow Freegle fair offer policy.