Your basic rights under the lease should include access to the premises, the benefit of any services (such as lighting, heating and cleaning), use of shared facilities (such as toilets or specified parking spaces) and the right to hang signs (such as your name plaque).
You need to check that these rights suit your business requirements. For example, a retailer would need to ensure that the right of access includes access for deliveries, and that the business would be permitted to post significant signage rather than just a small plaque.
The lease should also state the extent to which you are (or are not) allowed to make alterations to the premises. For leased (rather than licensed) premises, you would normally expect to be allowed to make internal non-structural alterations (though you might be required to reinstate the premises at the expiry of the lease).
