Heron Financial arranged a £154,000 mortgage at 38.5% LTV for two joint applicants in London, a healthcare support worker and a logistics worker, purchasing a £400,000 purpose-built two-bedroom flat with £246,000 of equity from a previous property. The case also navigated a down valuation, with the property valued at £388,000 against the agreed purchase price of £400,000. Heron Financial placed the case with NatWest on a fixed rate, and the mortgage completed in May 2026.
The clients
The clients were a couple working in London as key workers, one in healthcare support, the other in logistics. They were home movers, with significant equity built up over time in their previous property, and they were buying a £400,000 purpose-built two-bedroom flat. The equity available for the deposit was £246,000, roughly 61.5% of the purchase price.
They came to Heron Financial in the position many established home movers find themselves in: enough equity to dramatically reduce the loan needed on the next property, and a real choice about how much of it to deploy. The case landed at just £154,000 of borrowing, a 38.5% LTV mortgage, putting them firmly inside the sharpest pricing tier on the high street despite buying in one of the country’s most expensive markets.
The case at a glance
- Buyers: Joint home movers, employed (both key workers)
- Nationality: British
- Occupations: Healthcare support worker and logistics worker
- Property type: Purpose-built two-bedroom flat
- Location: London
- Purchase price: £400,000
- Valuation: £388,000 (down valuation of £11,000 against purchase price)
- Deposit: £246,000 from existing property equity (approx. 61.5%)
- Loan amount: £154,000
- LTV against purchase price: 38.5%
- LTV against valuation: 39.6%
- Lender: NatWest Intermediary Solutions
- Repayment method: Capital and interest
- Completion: May 2026
The challenge
On paper this was a comfortable case. The work sat in two specific places.
The down valuation. The property surveyed at £388,000 against the agreed purchase price of £400,000, a shortfall of £11,000. Down valuations are one of the more common stress points in a mortgage application, and how they’re handled determines whether the case completes on time. Options are typically: renegotiate the purchase price with the seller, increase the deposit to maintain the lender’s required LTV against the new (lower) valuation, withdraw from the purchase, or challenge the valuation with the lender. In this case the deposit position was strong enough to absorb the down valuation without renegotiation, the LTV against the lower valuation still came out at 39.6%, comfortably inside the sharpest pricing tier.
Sub-60% LTV pricing. Lender pricing improves in steps as LTV drops, with the sharpest pricing on the high street usually available at 60% LTV or below. At 38.5% LTV (or 39.6% against the lower valuation), the case was firmly inside that band. Crucially, the down valuation didn’t push it out, which it would have done if the deposit had been thinner.
Joint affordability for key workers. A £154,000 loan on two employed incomes is well within affordability for most working couples. Key worker income is treated cleanly by mainstream lenders, with NHS, social care, transport, logistics and emergency services pay all assessed routinely as PAYE income.
Borrow-less vs cash-buffer trade-off. With £246,000 of equity available, the clients had a real choice. They chose to deploy a substantial portion into the property and keep the loan low, a sensible decision that prioritised long-term security over short-term liquidity, particularly relevant for a couple in jobs where income growth is steady rather than spectacular.
How Heron Financial approached the recommendation
The Heron adviser focused on three things in sequence: the down valuation, the lender choice at low LTV, and the product fit.
Down valuation management. When the survey came back at £388,000 rather than £400,000, Heron Financial worked through the options with the clients. The strong deposit position meant they could absorb the shortfall without renegotiating the purchase or withdrawing, which kept the timeline on track and avoided the stress of last-minute price negotiations.
Lender mapping at sub-60% LTV. With the case landing well below 60% LTV, the mainstream lender market was wide open. Heron Financial narrowed the panel to those offering the sharpest pricing in the deep-LTV tier, with clean treatment of joint employed key worker incomes.
Lender choice. NatWest was the right home for this case. Their pricing at sub-60% LTV, their straightforward treatment of joint PAYE income, and their clean handling of the post-valuation underwriting made them the strongest fit on overall terms.
Product choice. A fixed rate gave the clients payment certainty on a deliberately modest loan. For a couple choosing to keep borrowing low, the priority is usually stability and a clean monthly payment rather than the cheapest possible short-term rate.
The outcome
The mortgage completed in May 2026. The clients moved into their new home with:
A £154,000 mortgage at 38.5% LTV (against purchase price)
A fixed rate on capital and interest repayment
The down valuation absorbed cleanly without renegotiation
The bulk of their previous-property equity deployed into the new home
What this means for buyers in a similar position
If you’re a home mover with significant equity built up over time, the LTV band you land in matters as much as the size of the loan you can afford. Dropping below 60% LTV typically unlocks the sharpest pricing on the high street, and that benefit doesn’t depend on your job title or income level, it depends on the deposit you put down.
Key workers, in particular, often have stronger equity positions than they realise after a few years of homeownership, and that equity can transform what’s possible on the next move. The other thing to be ready for is the down valuation: more common than buyers expect, less catastrophic than they fear, and far easier to absorb when the deposit position is strong.
FAQs
What happens if the lender's valuation is lower than the purchase price?
This is called a down valuation. Lenders calculate LTV against the valuation, not the purchase price, so if the valuation comes in lower, the LTV against the loan rises. Options are: renegotiate the purchase price with the seller, increase the deposit to maintain the lender’s required LTV, withdraw from the purchase, or challenge the valuation. The right route depends on the size of the shortfall and the strength of the deposit position.
Do you get a better mortgage rate at 40% LTV than at 60% LTV?
Usually not by much. Lender pricing typically improves as LTV drops, with the sharpest pricing available at or below 60% LTV. Below that, additional reductions in LTV don’t normally unlock further significant rate improvements, most lenders use 60% as their lowest pricing tier.
Can key workers in London get good mortgage rates?
Yes. Key workers, NHS, social care, transport, logistics, emergency services, teachers, are paid through standard PAYE and are well-served by mainstream UK lenders. The rate available depends on LTV, loan size, and the overall profile rather than on key worker status. Some lenders offer specific key worker affordability criteria, which can support higher loan sizes on the same income.
Should I deploy all my equity into the new property, or keep some as a cash buffer?
It depends. Deploying more equity reduces LTV, which usually gets you a better rate and a smaller loan. Keeping a cash buffer protects against moving costs, renovations, emergencies and future rate moves. Many borrowers do a mix. The right balance depends on income stability, the rate trade-off and how much liquid cash you want post-completion.
How common are down valuations in UK mortgages?
More common than buyers expect. Down valuations happen when the surveyor disagrees with the agreed purchase price, often citing comparable evidence in the local market. They’re not rare, particularly on flats and on properties where the agreed price is at the top of the local range. A strong deposit position makes them much easier to absorb.
