On every one of our tours we include hold luggage and carry-on allowance as standard. It does vary depending on the airline though. I am assuming that you are flying with BA from Heathrow? If so then you have a hold luggage allowance of 23kg and the dimensions of the bag must not exceed 90cm x 75cm x 43cm. Your carry-on must not exceed 56cm x 45cm x 25cm and you must be able to lift it into an overhead locker, plus a handbag no larger than 45cm x 36cm x 20cm.
I hope you have a lovely trip, and if you have any other questions don't hesitate to ask.