Mobility aids such as walking sticks can be taken on the aircraft free of charge and will not count towards your free baggage allowance, unless they’re being carried on behalf of someone who’s not travelling.
You can usually take mobility aids into the cabin with you. On occasions where there’s nowhere in the cabin to store them, the cabin crew will need to place them in the hold. If this is the case on your flight, the crew will be happy to help you get about the cabin as needed.
If you are travelling with a smaller mobility aid (like a walking stick) there's no need to contact the Special Assistance team in advance, but please do get in touch if you do have any questions.