Caught in a prime central London chain: how a bridging loan works when your vendor won't wait

Your vendor has accepted your offer on a Knightsbridge flat. Your solicitor tells you exchange on your outgoing sale is two to four weeks away, possibly longer. The vendor is fielding interest from a second buyer who can move today.

In prime central London, that gap between offer and confirmed funds is rarely academic. Sellers at £3M to £15M do not hold deals open indefinitely, and a competing buyer who can exchange promptly is a real threat. Losing the property because your own sale is three weeks behind is a painful but preventable outcome.

A bridging loan is the instrument that closes this gap. This piece explains how bridging loans work in a chain-break scenario: the mechanics of the facility, what the numbers look like on a PCL purchase, and how fast a direct lender can move from enquiry to drawdown.

How a bridging loan works in a chain break

A bridging loan is a short-term, first-charge facility secured against real property. In a chain-break scenario, the lender takes its charge over the property you are buying. The loan is sized against that incoming asset's open-market value: our prime central London bridging loans advance up to 75% of that figure. On a £5M flat in Mayfair, that is a maximum facility of £3.75M; you fund the remaining 25% from your own equity.

The underwriting logic differs from a mortgage in one material respect. We lend against the asset and your exit, not your gross income or debt-service capacity. The exit is the mechanism that repays the bridge: typically the completion of your outgoing sale, evidenced by the sale agreed and the conveyancing position. If that exit is clear and credible, the deal generally works.

The first charge ranks ahead of any other secured debt on the incoming property. If you hold other properties with existing mortgages, those remain separate and do not affect this structure unless you want to cross-charge additional security.

What the numbers look like in practice

Rolled-up interest is the standard structure for a chain-break bridge. Rather than making monthly payments, interest accrues against the loan from the day of drawdown and is settled in full at redemption, alongside the capital. The calculation to run before you commit: take the facility amount, apply the indicative monthly rate, and multiply by your expected hold in months. Then confirm your sale proceeds comfortably clear the full redemption amount with margin.

A hold of three to five months is typical for a PCL chain break. Your outgoing sale completes, funds clear, and you redeem the bridge. Stamp Duty Land Tax on the incoming purchase is also due at completion and must sit alongside the bridge's rolled-up cost in your cash plan; budget for both before you commit.

Related: our Mayfair deal with above-market LTV illustrates how this structure performs when the exit is clearly evidenced and the asset is well-supported by value.

From enquiry to drawdown: what the timeline looks like

We issue an indicative term sheet within 24 hours of receiving the core deal information: the property address, purchase price, loan amount, and an outline of your exit. The term sheet is not credit approval; it is indicative and subject to valuation and due diligence. But it gives you something concrete to put in front of the vendor as evidence that funding is in hand.

Drawdown typically follows in two to three weeks. The critical path covers three items: the independent valuation of the incoming property, legal due diligence on title, and KYC with source-of-funds verification on the borrower side. Urgent completions are possible inside seven days where legal and valuation work is already well advanced. See our full lending process from first contact through to drawdown.

When a bridge is the right tool, and when it is not

A chain-break bridge works when three conditions are met. The incoming property is a quality asset with a clear open-market value. Your outgoing sale is agreed and in conveyancing with a credible timeline to completion. The hold is short, typically three to six months. In that configuration, the cost is known, the exit is visible, and the bridge does its job cleanly.

It is the wrong instrument when the exit is speculative. If your outgoing property has not yet found a buyer, or the agreed sale is fragile, you are layering refinancing risk on top of timing risk. A bridge is not a device for buying time on a sale that may not materialise. It is a way to accelerate a purchase when the sale is real but the timing does not align.

The cost is also a real consideration. Rolled-up interest over several months on a multi-million-pound facility is a material number. If you are not certain the transaction justifies it, speak to our team before you commit: an indicative term sheet is free and gives you the full cost picture in writing. For context on what else to evaluate, our guide on picking a PCL bridging lender covers the questions worth asking any lender.