Seat belts were not compulsory in the back of the car until I was 18. I’m a nanny and my first charge had a wooden high chair that had 2 pieces, we put the top in the car and had the legs wedged down the back of the seat and the back of the high chair was tied around the back seat with bungee ropes. He bounced around happily. My dad decided it wasn’t a good idea and put a harness made from seatbelts from the scrapyard and a ‘booster’ seat which was very sturdy.
Out for drives with cousins and auntys and uncles. 9 times out of 10 one of the cares broke down and we would have 2 families in the car on the way home (5+ children, youngest 6 months, 2 large dads, 2 mums and between 3 and 5 dogs!)
Uncle had a large van, 3/4 dads squashed into 3 (bench) seats in the cab and anywhere between 5 and 12 children in the back with blankets/cushions, the dogs and bikes in the back. Going to Burnham Beeches and going off road so the children got bounced all over the van. Lovely memories of us crying with laugher! Yes we did usually ended up bruised but we got bruised climbing trees, fences or walls.
Being left in the pub garden (actually the car park with about 3x3 meters of dead grass and a tree trunk balanced on a larger tree trunk to clim on) for around 2 hours with a packet of crisps and both of coke each while our dads had a drink or 4.
Mum regularly drove dad to work at 11pm and we were asleep 25/30 minute round trip. I woke up twice, must have been woken by doors shutting and thought they had left us. I was 8 when we left that house (Dad got a job with accommodation attached) so my siblings would have been 6 and 2 and under when they left us alone.