Scotland A international Nick De Luca admits the opening stages of the 19-15 Heineken Cup defeat by Toulouse were the most frenetic he has ever experienced.
The 24-year-old centre scored a try as Edinburgh staged a spirited but unsuccessful comeback against the three times Heineken Cup winners on Saturday.
De Luca said: "You have got to get used to the tempo of the game and that was one of the fastest games I've been involved in. I've played against the likes of Biarritz, Leicester and Northampton before, but for the first 10 minutes of that game the tempo was unbelievable.'
Ireland Under-20s may be the only unbeaten side after two rounds of this year's Under-20s Six Nations, but full-back Billy Dardis believes this weekend's clash with England will be a step up from anything that has come before.