Ben played 90 minutes as Wales produced a fine display in the top-of-the-table clash against Israel in Haifa.
They leapfrogged Israel to the top of the group and remain unbeaten at the half-way point with a 3-0 victory thanks to a double from Gareth Bale and one from Aaron Ramsey.
Belgium are playing catch-up but could be top by Tuesday night - when they play Israel - thanks to a convincing 5-0 win against Cyprus in Brussels.
Jan played 90 minutes as goals from Marouane Fellaini (2), Eden Hazard, Christian Benteke and Michy Batshuayi saw Belgium home. Nacer and Mousa remained on the bench.
There was great news for our Academy as Luke Amos, Josh Onomah and Kyle Walker-Peters all started in England Under-18s' 6-1 win against Switzerland at Walsall.
Luke marked his debut for the Under-18s with an assist and Josh also claimed an assist in a comfortable win. Goals came from Adam Armstrong (Newcastle, 2), Tammy Abraham (Chelsea, 2), Taylor Moore (Lens) and Dominic Solanke (Chelsea).
It was Luke's first international appearance since representing the Young Lions at Under-16 level at the Victory Shield in 2012.
Below: Josh Onomah in action for England U18s vs Switzerland at Walsall
In European U19 qualifying, Filip Lesniak played 64 minutes as Slovakia beat Czech Republic to top their Elite group after two of three matches.
Harry Winks is with England U19s in their Elite group but was suspended for Saturday's 1-0 win against Azerbaijan. That was two wins in two and England now take on France for top spot.
Elsewhere, Charlie Owens and Chris Paul were with the Northern Ireland U19 squad beaten in a friendly by Dutch team AZ Alkmaar while on the senior front, Emmanuel Adebayor's Togo drew 1-1 against Mauritius.