In Lancashire we called it "French Skipping".We had a set sequence of moves which started from different "predicaments" These moves were:
1)
"In (both feet inside the elastics)
Out (both feet out- one either side)
In
Out
In
On(Land with both feet on the elastic-one on each side)
Out
Together(drag elastic sides together with feet)
In"

2)We then moved to "triangles"(pick up the elastic on one side with one foot, drag that foot over the opposite side, still with the elastic on the foot and drag the opposite side back with the heel. Then stand on the point of the triangle you have made.This was then the starting point for ".Back" (Jump backwards off the elastic)
"on" (landing with both feet on nearest elastic)
"in"
"on"(one foot on each elastic)
"Over"(jump over and land with both feet on elastic on opposite side)

Variations of the moves mentioned above were then performed in sequence,from other starting points such as:

Diamonds...(start off as a triangle, but then stretch out the other side to make a diamond, one foot on each elastic)

"Twirly" (start off by trapping the elastics between your feet, then turn round to face the other way , still trapping the elastic.This was generally recognised as an "expert " move, because it was difficult to jump up , release your feet from the wrapped round elastic and then land in the specified positions!)

The final move was "Scissors" (Start with one foot on each elastic , then jump up and land with the feet swapped to their opposite side.

As each person completed the whole sequence they then moved on to do it all again but with the elastic next on shins, then knees then thighs. The games could last for hours!

I introduced this to a primary school I was working in. The craze lasted for months.

Lovely memories!