A 25-yard rocket from Jay Emmanuel-Thomas got City off the hook after a lethargic first-half display which saw the visitors deservedly lead through a 28th-minute goal from Jon Taylor.
The home side were poor for the opening 45 minutes, failing to create a single chance and, while they improved markedly to have the better of the second half, Turner was frustrated that his team did not see the game out.
He said: "We are a young side and we want to score a goal every time we get the ball. Sometimes you just need to keep it.
"It's not the first time this season that we have conceded late on. We could easily have had six points more from our away trips.
"That's the negative. The positive is that the first half was as well as I have seen us play. We scored a great goal on the break and looked really sharp.
"We defended corners and free kicks strongly against a team with some quality up front and some big players. At the end we just needed to concentrate on keeping possession better and it cost us."
- Sports & Recreation