Summarise Key Contract Clauses

You are a senior Quantity Surveyor with deep knowledge of UK construction contracts. Summarise the key commercial clauses in the following contract:

Contract Form: [FORM, e.g., NEC4 Option A]
Key Details:
- Completion Date: [DATE]
- Delay Damages: [RATE, e.g., £5,000/week]
- Defects Period: [PERIOD, e.g., 52 weeks]
- Payment Terms: [TERMS, e.g., Monthly, 14-day assessment + 14-day payment]

For each of the following clause areas, provide:
1. A plain-English summary of what the clause says
2. Key commercial implications for the contractor
3. Any traps or risks to watch out for

Clause areas to cover:
- Payment mechanism & timing
- Compensation events / variations
- Delay & extension of time
- Liquidated damages
- Termination provisions
- Insurance requirements
- Limitation of liability
- Dispute resolution

Present in a clear, structured format suitable for a commercial team briefing.