ISM Marine
ISM Marine provides integrated solutions for bulk freight in London and the South East, including towage services and marine civils support across the region.
Capabilities
- Coastal barge towage
- Inland barge towage
- Marine civils support
- Ship towage
On the Thames
Operating one the most versatile marine fleets on the Thames, ISM has combined capability across inland and coastal barge towage, ship towage and proven support for major infrastructure projects including Elizabeth Line, Tideway and HS2. The company is especially proud of its award-winning safety performance.
Part of the GRS Group
As part of the GRS Group, we provide complete end-to-end material handling packages. We remove construction waste for recovery and recycling, and deliver high-volume primary and secondary aggregates. Our capability also means we move anything that can go by water, including containerised cargo and breakbulk loads.
ISM transports almost 5,000 tonnes of materials and goods by river and sea each day, keeping around 250 lorry journeys off the South East’s busy highway network and saving over 90% of the carbon emissions of the equivalent road haulage.







