strap Friday's Child Gotta be close to the youngest first team plus subs for both sides combined in any game at this level? Stattos?
Rather sadly I do have the raw data that will allow me to caculate that, well for RFC teams back to 1920 and for opponents temas back to 1970.
Give me a day or to to knock up a bit of code and I'll be back. (I really need to get some work don't I??

)
As promised, I have delved into the opponents ages and the five youngest squads of opponents back to 1970 are:
20/03/76 v Darlington. Average age of the 12 named players was 19.69 years
11/02/84 v Chester C. Average age of the 12 named players was 20.61 years
17/10/78 v Darlington. Average age of the 12 named players was 20.72 years
10/03/82 v Bristol C. Average age of the 12 nmaed players was 21.34 years
10/04/01 v AFC Bournemouth. Average age of the 16 named players was 21.81 years.
The average age of the 18 named players for Ipswich on Tuesday night was 24.76 years.
Looking at just the starting XI, the youngest 5 games were (top 4 all as above) are:
20/03/76 v Darlington. Average age of the starting XI was 19.10 years
11/02/84 v Chester C. Average age of the starting XI was 20.4 years
17/10/78 v Darlington. Average age of the starting XI was 20.76 years
10/03/82 v Bristol C. Average age of the starting XI 21.34 years
13/03/82 v Wimbledon. Average age of the starting XI was 21.85 years.
The average age of the 11 starters for Ipswich on Tuesday night was 25.56 years.
So not particularly "young" opponents. In fact the Barnsley starting XI on Saturday was younger at 25.40 yrs. Youngest starting XI this season was Nottingham Forest at 24.72
The youngest RFC starting XI's I can find are
21.40 27/11/1981 Southend United
21.82 29/04/1972 Colchester United
21.89 02/01/1982 Newport County
22.01 05/12/1981 Lincoln City
22.01 18/08/2009 Swansea City
As for squads, these are (all 5 matches had a sqaud of 12)
21.53 27/11/1981 Southend United
21.68 29/04/1972 Colchester United
21.97 23/01/1982 Plymouth Argyle
21.97 27/01/1982 Brentford
22.02 05/12/1981 Lincoln City
Tuesdays match had an average starting XI age of 25.15 years for RFC, and if you include the bench the 18 named players had an average age of 24.66. So again young, but not particularly so. Since 1920, it is actually the 704th youngest squad we have put out in 4213 games.
Finally, the question was actually was the Ipswich game the lowest combined age of the teams. As you will probably glean from the above, the answer is no. The top 5 youngest combined starting XI's since 1970 have been:
22.17 10/03/1982 Bristol City
22.26 17/10/1978 Darlington
22.43 11/02/1984 Chester City
22.45 19/08/1978 Grimsby Town
22.58 13/03/1982 Wimbledon
Tuesday's game was 25.36.
Finally for those poor souls who are still reading this drivel, the top 5 youngest combined squads have been :
22.18 17/10/1978 Darlington
22.23 10/03/1982 Bristol City
22.36 11/02/1984 Chester City
22.46 13/03/1982 Wimbledon
22.55 19/08/1978 Grimsby Town
The average age of the combined squads on Tuesday was 24.71.