Giant Offshore Drilling Rig Spotted From Ainsdale Beach

Visitors to Ainsdale Beach may have noticed an enormous structure towering above the horizon in the Irish Sea, but what exactly is it, and what is it doing so close to the Sefton coastline?

The impressive structure, which looks almost like a floating industrial city, has been identified as the ENSCO 120, a giant offshore drilling rig currently operating in Liverpool Bay.

Photographs taken from Ainsdale Beach show the enormous installation standing out against the horizon, with its towering steel legs and industrial equipment clearly visible from the shore.

And following a little investigation, we can reveal some fascinating details about this unusual sight.

What is the ENSCO 120?

The ENSCO 120 is a mobile offshore drilling platform known as a jack-up rig.

Unlike permanent oil platforms, which remain fixed in one position, jack-up rigs are designed to move between different offshore locations.

The ENSCO 120 was built in 2013 and measures approximately 102 metres long and 80 metres wide.

Its most striking features are its three enormous lattice steel legs, which can be lowered towards the seabed to support the platform during offshore operations.

Once positioned, the rig can raise its main working platform above the water, providing a stable base for drilling and other operations.

Despite its enormous size, the structure can be relocated when required.

Where is it now?

Marine tracking information recorded on Thursday 5 November 2026 placed the ENSCO 120 approximately 9.8 kilometres west of Birkdale, making it clearly visible from parts of the Sefton coastline.

The rig was reported at a standstill in Liverpool Bay, with its position recorded at approximately 53.6309° north and 3.1635° west.

Its location helps explain why beachgoers at Ainsdale can see such a large industrial structure apparently standing in the middle of the sea.

A new development this week

Interestingly, an official marine notice published on 3 November 2026 confirms that a move involving the ENSCO 120 has been planned.

The notice states that the rig is due to move from the Hamilton East wellhead to the Lennox subsea well in Liverpool Bay.

Both locations form part of the offshore energy infrastructure in the Irish Sea.

The notice does not confirm exactly when the move will be completed, but it demonstrates that the enormous installation is part of ongoing offshore operations rather than a permanent structure in one location.

What is happening beneath Liverpool Bay?

The waters off Southport, Ainsdale and Formby have supported offshore oil and gas operations for decades.

More recently, Liverpool Bay has also become central to one of the North West’s most significant environmental and industrial projects.

The HyNet North West initiative involves plans to capture carbon dioxide emissions from industrial facilities and transport them for permanent storage in depleted gas reservoirs beneath the seabed.

As part of the wider transformation of Liverpool Bay’s offshore infrastructure, existing wells are being decommissioned while others are being prepared for potential reuse.

Previous offshore work in the area has involved converting suitable wells for carbon dioxide storage.

Although the ENSCO 120 is currently associated with activity at existing Liverpool Bay well locations, its precise assignment has not yet been independently confirmed as part of the carbon storage programme.

Is the Rig Installing More Wind Turbines?

Following enquiries from readers asking whether the enormous structure is connected to the installation of more offshore wind turbines, we can confirm that this is not a wind turbine installation vessel.

The ENSCO 120 is an offshore drilling rig, and its presence in Liverpool Bay is associated with existing oil and gas infrastructure. The area is also undergoing significant changes as part of the HyNet North West carbon capture and storage project, which aims to store carbon dioxide deep beneath the seabed in former gas reservoirs.

Although the rig’s exact current assignment has not been confirmed, an official marine notice indicates that it is due to move between two existing offshore well locations.

So, despite its appearance, this particular structure is not there to install more wind turbines.

Why does it have three enormous legs?

One of the most fascinating things about the ENSCO 120 is how it operates.

When travelling between locations, a jack-up rig can float with its enormous legs raised.

Once it reaches its destination, the legs are lowered towards the seabed.

The main platform can then be elevated above the waves, creating a stable working environment for offshore operations.

This design allows the rig to operate in conditions that would make drilling from an ordinary floating vessel much more difficult.

An extraordinary sight from Ainsdale Beach

For anyone walking along Ainsdale Beach, the ENSCO 120 is certainly an unusual addition to the familiar coastal landscape.

From a distance, its towering steel framework can resemble a huge building standing in the middle of the Irish Sea.

And while it may appear relatively small on the horizon, the structure is actually more than 100 metres long.

With a planned relocation now announced, anyone hoping to photograph the rig from Ainsdale may want to take the opportunity while it remains in its present position.

Have you spotted the enormous drilling rig from Ainsdale, Birkdale, Southport or Formby?

We would love to see your photographs and hear whether you have noticed it moving around Liverpool Bay.

Photographs: ENSCO 120 viewed from Ainsdale Beach.