Mezini Brothers Ltd — Project Portfolio

Six projects.
Delivered to spec.

From 33kV transformer bunds in rural substations to a £500K Tesla battery storage facility — every project delivered safely, on programme, and to DNO standards.

01
M Group Transformer Bund

Radnor T1 & T3
Transformer Bund

Radnor T1 & T3 — reinforcement steel mesh and shuttering
Radnor T1 & T3 — completed concrete bund structures

Construction of weight-bearing plinths and oil containment bunds for two 33kV transformers, including all excavations, reinforcing steel, formwork, and concrete pours. Bunds filled with engineered shingle and gravel layers to safely contain full transformer oil volume.

  • Excavation to formation levels
  • Reinforcing steel fixing & formwork
  • Concrete pour to client standards
  • HV & LV cable ducting & concrete encasement
  • Oil containment layer system
Transformer Bund 33kV Reinforced Concrete Oil Containment
2025 Year Delivered
33kV Infrastructure
2 Transformer Bunds
M Group Client
02
M Group / UKPN Raft Foundation

Peterborough East
Grid Substation

Peterborough East — rebar positioned for concrete pour
Peterborough East — completed concrete raft foundation

Construction of a reinforced concrete raft foundation supporting an elevated switchroom at Flagship Park, Peterborough. Works integrated with the existing site earthing system and built to strict UK Power Networks quality, safety, and dimensional requirements.

  • Service detection & controlled excavation
  • Ground improvement & blinding layer
  • Steel reinforcement installation
  • High-strength structural concrete pour
  • Earthing system integration
Raft Foundation UKPN Standards Grid Substation Switchroom
2025 Year Delivered
UKPN End Client
Grid Substation Type
M Group Tier 1 Client
03
UKPN Transformer Replacement

Honington Primary
Replace T1 & T2

Honington Primary — steel reinforcement mesh preparation
Honington Primary — precast fire protection walls installed

Civil and structural works enabling the installation of new primary transformers at Honington Primary substation. Scope included precast fire protection blast walls providing a minimum 4-hour fire resistance rating, alongside full concrete bases, bunds, and plinths.

  • Excavation & ground remediation
  • Reinforced concrete transformer bases & bunds
  • Precast fire protection walls (4-hr fire rated)
  • Duct installation & oil containment
  • Full area reinstatement
Primary Substation Precast Blast Walls 4-Hr Fire Rating UKPN
2025 Year Delivered
4 hr Fire Rating
UKPN Client
Primary Substation Class
04
M Group Substation Extension

Wix Primary
Substation

Wix Primary — completed transformer compound with GRP enclosure
Wix Primary — crane lifting precast FastBase slab into position

Mezini Brothers' first deployment of FastBase pre-fabricated transformer bases at Wix Primary Substation, Colchester. This innovative low-carbon system drastically reduced on-site working time compared to traditional in-situ concrete, whilst meeting all DNO structural requirements.

  • Pre-fabricated FastBase transformer bases
  • Trenching & duct installation
  • HV & LV cable pulls
  • Substation compound enabling works
FastBase Pre-fab Low Carbon Substation Extension Wix, Colchester
7 wks Duration
2023 Year Delivered
FastBase Innovation
M Group Client
05
JSM • Tesla • EO Charging Battery Storage Facility

Chandos Road
Battery Storage

Chandos Road — Tesla Megapack batteries installed on concrete slabs
Chandos Road — concrete pad foundations across site layout

Working alongside JSM, Mezini Brothers provided all civil infrastructure for a new Tesla Megapack battery storage facility for EO Charging. The project encompassed demolition and site preparation through to final reinstatement, delivering a complete civil package over 10 months.

  • Demolition & site preparation
  • Cable trenches, ducting & cable pulls
  • Reinforced concrete slab & pad foundations
  • Surrounding walls & hoarding
  • Backfills & resurfacing
Battery Storage Tesla Megapack EV Infrastructure £500K
£500K Contract Value
10 mths Duration
Tesla End Client
JSM Tier 1 Client
06
Morrisons Energy Services / UKPN Connection Works

Stirling Way
North Peterborough

Stirling Way — excavated cable trench with parallel duct runs to substation
Stirling Way — shuttering and formwork for concrete foundation base

A UKPN connection project supporting Morrisons Energy Services at Stirling Way, North Peterborough. Delivered over 4 weeks with 200LM of excavations, 500+ metres of ducting installation, and multiple structural concrete bases to support the network connection.

  • 200LM of excavations
  • 500M+ of ducting installation
  • HV cable pulling
  • Multiple structural concrete bases
UKPN Connection 500M+ Ducting North Peterborough £100K
£100K Contract Value
4 wks Duration
500M+ Ducting Installed
UKPN End Client
07

Your project,
our expertise.

Accreditation
CHAS Accredited Contractor
Certification
Avetta Certified
Serving

UK Wide
DNOs & Tier 1