Wrong department, Marshwarble.
The DHSS originally morphed into the DSS. The 'welfare' section of the former DSS now comes under the Department for Work & Pensions.
Why would anyone remove doors? Perhaps to ensure that their pets have freedom of movement? (e.g. it's not much use having a cat flap in a kitchen door, for example, if your cat keeps getting shut in a bedroom by your kids. You end up with the cat peeing in your bedroom). Or perhaps because they could only afford to switch the heating on in one room but wanted to ensure that sufficient heat reached other rooms to keep the chill off? Or perhaps because they simply got fed up of their kids slamming the doors all the time?