As a member of the Guild of Registered Tourist Guides I work to the Guild's established fee structure and terms and conditions which can be found here: www.britainsbestguides.org/fees-information/
My profile can also be found on the Guild website: www.britainsbestguides.org/guides/3835/rosemary+english/
Entrance fees for gardens are usually in the range of £5 - £10.
Entrance charges for Galleries, Museums and National Trust properties vary.
Most places offer concessions.
Cathedrals usually ask for a voluntary contribution whilst churches generally do not request payment.
* Special exhibitions may incur a fee