**Core Concept**
The decision to attempt a trial of labour is based on careful consideration of various factors that could affect the safety and success of the procedure. **Uterine rupture** and **previous uterine surgery** are significant concerns.

**Why the Correct Answer is Right**
Since the correct answer is not provided, let's discuss a general scenario where a condition is not a contraindication for a trial of labour. For instance, a **low-lying placenta** might not be an absolute contraindication, depending on its exact location and other clinical factors.

**Why Each Wrong Option is Incorrect**
**Option A:** Could be incorrect if it involves a condition like previous uterine rupture, which is a significant contraindication.
**Option B:** Might be incorrect if it mentions a condition such as multiple previous cesarean sections, which increases the risk of complications.
**Option C:** Could be incorrect if it refers to a condition like a classical cesarean section scar, which poses a high risk of uterine rupture.
**Option D:** Might be incorrect if it involves a condition such as placenta accreta, which is a contraindication due to the high risk of severe bleeding.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that each patient's situation is unique, and what might be a contraindication for one patient might not be for another.

**Correct Answer:** D. Previous low-lying placenta.