Swiss Swirl Ice Cream Cake

6 medium sized eggs
1 C / 225 gms caster sugar /8 oz+ extra for rolling
6 tblsp / 45gms/ a pinch over 1.5 oz of all purpose (plain) flour + 5 tblsp/40gm /a pinch under 1.5 oz of natural unsweetened cocoa powder, sifted together
2 tblsp /30ml / 1 fl oz of boiling water
a little oil for brushing the pans
For the filling-
2C / 500 mls/ 16 fl oz of whipping cream
1 vanilla pod, cut into small pieces of about ½ cm (or 1 tsp vanilla extract)
5 tblsp / 70gms/2.5oz of caster sugar