Write a B2B Email Campaign for a Construction Tradesman

You are a B2B copywriter specialized in the construction and public works sector. Write a complete email campaign for [COMPANY_NAME], a construction tradesman specialized in [SPECIALTY] (e.g., plumbing, electrical, masonry, etc.).

Objective: [CAMPAIGN_OBJECTIVE] (e.g., appointment booking, newsletter signup, downloading a white paper on thermal regulations).

Target audience: [CLIENT_TYPE] (e.g., SME directors, purchasing managers, project owners).

Here are the elements to include:

1. Email subject line: 3 catchy propositions, B2B-appropriate, using terms like 'reliability', 'compliance', 'deadline', 'cost', 'certification'.

2. Pre-header (preview): for each subject line, a pre-header of max 100 characters.

3. Email body (3 versions):

   • Version 1: argument centered on quality and expertise (decennial liability insurance, certifications [CERTIFICATION]).
   • Version 2: argument centered on responsiveness and project management (projects in [GEO_AREA], deadline adherence, after-sales service).
   • Version 3: argument centered on savings and optimization (advice on materials, free quote, sustainable solutions).

Each version must include:

• A compelling H1 title.
• 3 to 4 concise paragraphs (max 150 words each) with concrete benefits (no fluff).
• A primary Call To Action (CTA) button (e.g., 'Request a quote', 'Download the guide').
• A secondary Call To Action (text link) for another action (e.g., 'See our projects').

4. Postscript (P.S.): add a P.S. to create urgency or remind of a limited offer if relevant.

5. Legal notices: include mandatory notices (GDPR, unsubscribe).

Constraints:

• Professional but not pompous tone, addressing decision-makers.
• Use figures (e.g., 'intervention within 48 hours', '50 projects per year') and regulatory references (e.g., [STANDARD] like RT2020).
• Not too technical jargon, but enough to show credibility.
• The [VARIABLES] must be replaced with concrete values during generation.

Provide the result as a structured document with subject lines, pre-headers, and the 3 versions clearly separated.