If your baggage is delayed or lost in transit, you should tell the company transporting your baggage within 24 hours of discovery. Ask them to complete a Property Irregularity Report or give you with a baggage loss receipt. If your baggage is delayed for more than 12 hours from when you arrive at your destination, your policy provides cover to buy necessary items (up to £50, £100 or £150 depending on your tier of cover).
If your baggage is stolen, you should report this to the local police within 24 hours of discovering the theft and get a written report. You can claim (up to £1,000, £2,000 or £2,500 depending on your tier) for stolen or lost items. There's a single item limit and total valuables limit (up to £200, £300 or £400 depending on your tier).