Possible Clues:

• Belonging to different unions but working together
• At the same time - trendy, consisting of one child
• Ulster, so it's there altogether
• Unanimity of the boy following resident at Cambridge, for example
• Where should I be to get my degree, Dad? All together now!
• Altogether?
• As one
• At one on the pitch
• Never solo where it's Ulster like this
• Agreement among different unions