Headgear for space

Space Helmet, J&L.R.Ltd., England,
1950's

Love that music !

Space Helmet, no markings, England ?
1950's ?

The blue, red and yellow helmet is an obvious English version of the American Renwall helmet (by the way, I am still looking for the clicker gun that goes with it). The red, yellow and pink version, however, I have no clue. It seems that the thickness of the plastic is different (especially the head-piece is thinner) as well as differences in the closing at the back. (it is in one piece - the yellow version is splitted at the back for easier opening). Any extra information ?

OK, here we have some news on the yellow helmet:

"The markings are for J & L Randall otherwise known as Merit Toys, the company had been called Bellbefore the J and the L got married! "

and regarding the red and pink one:

"the Merit moulds went to PPP/Gaugemaster in the 1990's, they wouldn't have reproduced it, they only deal with model railways and there is little market for that sort of toy now, but maybe the unmarked one is Bell? If the mouldings are the same, they will both be Bell/Merit. But...Merit was a bit of a pirate....Pyro being a victim?"
Thank you Hugh !