There is a mention that there is no weight restriction on the Cabin baggage unless they impose it separately per flight.
20.3.1 passengers are permitted one piece of Cabin Baggage which must comply with the following criteria:
• the maximum dimensions of the Cabin Baggage may not be any larger
than 56x45x25cm (including wheels, pockets and handles). However, due
to restrictions on available space in the aircraft cabin on many busy
Flights, We reserve the right to place any Cabin Baggage in the hold
which is bigger than 50x40x20cm (including handles, pockets and
wheels), (See Cabin Baggage FAQ)
• all Cabin Baggage must easily fit within the size dimensions of the
Baggage size gauges provided at our Bag Drop desks at the airport and
at the departure gates.
• no weight restriction applies to the one
item of Cabin Baggage within reasonable limits - i.e. a passenger must
be able to place and retrieve the one item of Cabin Baggage safely in
the overhead storage lockers without assistance. On occasion it may be
necessary to impose a weight limit for operational reasons. In this
instance Your Cabin Baggage will be placed in the aircraft hold at no
additional charge provided You have complied with all applicable
Baggage requirements and limitations contained in Our Terms and
• any handbag, briefcase and/or laptop bag must be
carried within the allowance of one permitted piece of Cabin Baggage.
• an overcoat, shawl, umbrella or walking stick and one bag of goods
purchased after You have cleared the security screening point at the
departure airport may also be carried in addition to the allowance of
one item of Cabin Baggage.