Cycle 12's PharmSee Wolds pillar treated Louth, Horncastle and Mablethorpe as the three anchor towns of the Lincolnshire Wolds pharmacy map. That was the right first cut. The second-tier question is whether the regime extends: do the smaller Wolds towns — Spilsby, Alford, Market Rasen — share Horncastle's under-supplied signature (2.0:1 at 10 miles), or does each town have its own catchment logic?

PharmSee's cycle-16 audit pulled 3-mile-free 5-mile and 10-mile ratios for all three towns. The answer is three different regimes.

The second-tier measurements

Horncastle's 10-mile ratio (2.0:1) is still the highest in the Wolds. But these three towns are nothing like each other, and treating "the Wolds" as a single catchment regime is wrong.

Spilsby: the Wolds' second under-supplied anchor (1.33:1 at 10mi)

Spilsby's 10-mile ring catches twelve GP practices — the same count as Horncastle — against nine pharmacies. That is comfortably the second-highest ratio in the Wolds second-tier, and the only second-tier town that shares Horncastle's under-supply profile. The difference is that Spilsby's 10-mile ring extends east toward the A16 corridor, picking up Burgh-le-Marsh, Wainfleet and parts of the Skegness hinterland, so the pharmacy count is higher. A well-sited addition near the Spilsby market square would face the same commercial argument as a Horncastle branch — roughly one pharmacy per 1.33 GP practices, with real footfall headroom.

At 5 miles Spilsby runs 2.0:1 (two GP practices, one pharmacy), which is a real operational strain for the single incumbent pharmacy during prescription-week peaks.

Alford: the seasonal coastal over-supply (0.6:1 at 10mi)

Alford's 10-mile ring captures the LN12 coastal strip — Mablethorpe, Sutton-on-Sea, Anderby — where pharmacy density is inflated by seasonal holiday demand and retiree concentration. PharmSee measures 15 pharmacies against 9 GP practices, a 0.6:1 ratio. On GP-volume alone this looks over-supplied. But the coastal branches are sized against summer walk-in footfall, not winter prescription volume — the ratio-flipping is a signature of leisure-trade catchments.

Cycle 10's Mablethorpe article treated this as a "summer spike" regime. Alford's measurement formalises the rule: the Wolds eastern fringe runs structurally pharmacy-heavy because the working population of those pharmacies is not just the GP-registered list, but also the several hundred thousand annual visitors to the Lincolnshire coast.

Market Rasen: thin-catchment balance (1.5:1 at 10mi)

Market Rasen sits on the western edge of the Wolds, away from the coastal strip. Its 10-mile ring picks up only 6 GP practices and 4 pharmacies — a thin catchment in absolute terms, but a balanced 1.5:1 ratio. Market Rasen is not under-supplied and it is not over-supplied; it is simply a small-catchment market town where the existing pharmacy count is proportionate to the GP list.

At 5 miles, Market Rasen actually runs 0.5:1 (one GP practice, two pharmacies) because the town centre has two operating pharmacies against the single Market Rasen Surgery. That is a classic market-town configuration — two-pharmacy competition serving one GP list — and it is healthy, not overcrowded.

What this means for operators

The Wolds second-tier is not one opportunity. It is three:

• Spilsby (1.33:1) — a genuine operator opportunity. The catchment has real under-supply at 10 miles and real 5-mile pressure on the single incumbent.
• Alford (0.6:1) — a seasonal-trade catchment. Any new branch would fight existing operators for the same coastal footfall pool and would face a 6-month winter trough. Not an under-supply opportunity.
• Market Rasen (1.5:1) — stable, proportionate, unlikely to reward a new entrant. A balanced catchment.

This is why PharmSee's pharmacy-atlas analysis is built at the postcode level rather than as "regional averages". A Lincolnshire Wolds average would paper over a 0.6 → 2.0 range of real catchment signatures, and operators acting on that average would misplace their capital.

Use PharmSee to check any Wolds (or rural English) postcode

The PharmSee location analyser returns the 3, 5, 10 and 15-mile GP-to-pharmacy ratios for any English postcode. Rural catchments should always be quoted as a 5-mile primary / 10-mile corridor pair under PharmSee's two-ring convention — single-ring rural ratios mislead because they are sensitive to which GP surgeries fall just inside or just outside the boundary.

Takeaway

Horncastle sits at 2.0:1 at 10 miles and Spilsby at 1.33:1 — those are the two under-supplied Wolds anchors. Alford at 0.6:1 is a coastal-seasonal catchment that should not be read as "over-supplied". Market Rasen at 1.5:1 is a stable balanced market. The Wolds is not one regime. Any new-branch site-selection exercise that treats it as one will misallocate capital.

Measurements: PharmSee location analyser, 5-mile and 10-mile ring, PE23 5HE / LN13 9BG / LN8 3AR reference postcodes, 11 April 2026.