17.2 Flight CancellationsIf we cancel a flight we will endeavour to contact you in advance (via phone or email) through the contact details presented to the airline or authorised agent at the time of booking. We shall act in accordance with the Montreal Convention and EC regulation 261/2004 and except as otherwise provided therein and subject to Article 6.2.4, we shall at your option; 6.2.1 carry you at the earliest opportunity on another of our scheduled services on which space is available without additional charge and, where necessary, extend the validity of your ticket or:- Within a reasonable period of time re-route you to the destination shown on your Ticket by our own services or those of another Carrier, or by other mutually agreed means and class of transportation without additional charge or- Make a refund in accordance with the provisions of Article 9.- When a flight is cancelled the options outlined in Article 6.2.1 through to 6.2.3 are the sole and exclusive remedies available to you and we shall have no further liability to you. Notwithstanding the foregoing, we shall not be liable to you for any loss or damage occasioned by such cancellation and the remedies mentioned in Article 6.2.1 through to 6.2.3 will be available to you at our discretion, if we have taken all reasonably necessary measures to avoid the damage or it was impossible for us to take such measures.
Taken from https://www.cityjet.com/flying-with-us/terms-and-conditions/
Its bad news I am afraid. Their terms say they can re-route or provide a different carrier or indeed provide a refund
If that is the case and they refund you sadly they are not obliged to compensate for your additional cost.
If you have travel insurance though then they may well cover you for this type of event
But based on the terms and conditions you do not have a claim.
I am sorry if this is not the answer you want and certainly not the one I want to give you, but I have a duty to be honest
Can I clarify anything for you about this today please?
Many thanks for your prompt reply. I didn't think I was entitled to compensation, but thought it was worth asking. I have raised a complaint directly with CityJet.
Thanks again, great service.
Indeed, I think that is all you can do but its always worth confirming the legal position first.