"The lesson that needs to be learnt from this result is that concentration and discipline are key to winning football matches."
That was the honest assessment of Coach Kevin Fogg, after United's U18s were beaten 4-1 by Bolton at Shirecliffe on Saturday.
Despite taking an early lead through Jordan Chappell, who later had to be withdrawn through injury, the Blades made several elementary mistakes to gift the visitors what turned out to be an easy win.
The hosts started brightly, after injuries had forced a reshuffle of the pack, and took the lead in the 6th minute.
Wilkinson freed CHAPPELL who cut in from the left and unleashed an unstoppable drive into the top corner.
Gregory and Chappell both had efforts on goal, before a defensive mix-up gifted Bolton a corner, which they scored from.
Pennycooke-Morgan replaced injury victim Chappell and either side of attempts from Lammy and Slew, the visitors scored their second and third goals after United gave away possession cheaply.
Some stern words at half-time saw the Blades come out playing with more determination and pride and James led from the front after moving into midfield following Murray's withdrawal.
Jordan Slew worked tirelessly up front on his return from injury and on another day his hardwork could have brought him a hat-trick.
Bolton completed the scoring just before the end when a disputed free-kick took a wicked deflection off O'Kane to wrong foot Billard, which just about summed up United's fortunes.
Blades: Billard, Brown, Roe, Wilkinson, James, Foster, Lammy, Murray (O'Kane 51), Gregory, Slew (Ahmadi 73), Chappell (Pennycooke-Morgan 22).
Unused: Andrew.