That may not be correct. As Joey stated on the previous page.
If Utd win EL and get CL, then the rules state their EL spot goes back to another nation (Eng get 5 CL & 2 EL).
However, in 5th or 6th they'd have earned EL via 2 routes: league (groups) & league cup (qualifiers)
I presume the lowest EL qualification, namely league cup & EL qualifiers, would go to another nation.
Which means 7th would actually get the EL equivalent of 6th (Eng's 2nd EL spot) ie groups
From the 2015/16 season, the various permutations allow for a maximum of five English clubs to qualify for the UEFA Champions League and five for the UEFA Europa League.[1] The minimum quota is for four English clubs to qualify for the UEFA Champions League and three for the UEFA Europa League.
As I said above, there isnt a Europa league place for 6th.
https://en.wikipedia.org/wiki/English_football_clubs_in_international_competitions
UEFA Europa League group stage FA Cup winners If the FA Cup winner qualifies for the UEFA Champions League or the UEFA Europa League via the domestic championship, by Regulation 3.04,[2] the highest ranking non-qualified league club qualifies, taking the lowest Europa League spot (the League Cup spot – the League Cup inherits the League spot, and the League inherits the FA Cup spot).
UEFA Europa League play-off round Club finishing 5th in the Premier League If the fifth-placed club has already qualified for Europe through the FA Cup, then the next-highest Premier League finishers get this place
UEFA Europa League third qualifying round League Cup winners If the League Cup winners have already qualified for Europe by a high Premier League finish, then the next highest-finishing Premier League club gets this place