I recently flooded my diaper which then leaked past my plastic pants and wet the bed. So last night I tried a different combination, this seems to be a success.
So last night I put on the traditional diaper (taped, all in one) as usual, making sure that the tapes were as tight as possible without splitting, I then put on my velcro fastening (6 layer) terry toweling nappy and made sure the latter was fully covering the inner diaper, including the leg elastics and more importantly the waist. I then found a heavy duty pair of soft pvc pants with a thick waist elastic (about/nearly one inch) and adjusted the adjustable fully enclosed leg elastics to be tight, but not too tight. This combination makes a very absorbant diaper and it seems a leakproof one for me.
The only down side was with all the layers and the thickness it was more difficult to walk and I found it arousing. I tried to ignore that and go to sleep. The bed is dry this morning and the nappy is soaked. I am happy