Ask an Property Solicitor. Get an Answer ASAP.
I will now turn to your enquiry and assist you as best i can so please bear with me.
Are you the landlord or tenant? Is this a brand new lease or existing one?
The landlord will instruct a solicitor to prepare the lease. Most commercial leases have the same template and can be lengthy so you should instruct a solicitor. You will also be liable for the landlord costs. As most leases are fully insured and repair leases you should undertake substantial investigation on the property before committing to this as you will be liable so a survey is advisable.
Are there any particular questions you have or are you wanting a solicitor to act as that i can only offer general legal advice on this site.