PharmSee's nine-city Tesco audit covered 13 operating branches across England, with a 3.14× per-branch revenue spread from Liverpool's £166,567 down to Nottingham NG9's £53,062. Eight of the nine city cores carried at least one Tesco pharmacy inside the 3-mile ring. Plymouth PL1 1AA was the only zero.

That finding is worth a standalone piece because it is structural, not coincidental. Plymouth's supermarket pharmacy sector is meaningfully different from every other atlas city, and the zero-Tesco result has downstream consequences for the local job market, the Well / Day Lewis competitive balance, and the already-established "Boots 11× vacancy multiplier" Plymouth story.

The PL1 1AA 3-mile pharmacy composition

Cycle 20 re-pulled /api/location/analyze?postcode=PL1+1AA&radiusMiles=3 and got 43 pharmacies and 64 GP practices (1.49 ratio). The chain composition:

The supermarket-pharmacy tier in PL1 consists of one Morrisons branch at £113,410 and one Superdrug at £44,332. That is the entirety of PharmSee's supermarket-pharmacy footprint in Plymouth city core. No Tesco, no Asda, no Sainsbury.

For comparison, the other eight atlas cities average 1.9 supermarket-pharmacy branches in the same 3-mile ring (Tesco + Asda + Morrisons combined). Plymouth has 1. Plymouth's supermarket pharmacy sector is half the atlas average despite being a city of comparable size to Newcastle and Sheffield.

The structural explanation

Three factors combine to produce Plymouth's zero-Tesco:

1. Plymouth's Tesco Extra stores sit outside the 3-mile PL1 ring. Tesco Transit Way (Roborough) is 4.1 miles from PL1 1AA. Tesco Lee Mill (Ivybridge) is 8 miles east. Tesco Saltash is 4.6 miles west across the Tamar. Both Roborough and Lee Mill run Tesco pharmacy counters, but neither sits inside a 3-mile ring centred on the city centre. Plymouth's retail geography places Tesco Extra outside the city-core band that the atlas measures.

This is not a Tesco-specific problem. PL1 1AA's 3-mile ring picks up 43 total pharmacies versus 97 in Sheffield S1 or 106 in Liverpool L1 — Plymouth is a geographically compact city-core with low-density edges, so any retail format that prefers out-of-town locations will sit at the ring edge rather than inside it.

2. Well Pharmacy occupies the supermarket-tier slot. With 14 branches averaging £105,560, Well runs the highest branch count in the PL1 ring — more than Boots (10), more than any independent cluster (12). This is the only city in PharmSee's atlas where Well outnumbers Boots at city-core level. The structural interpretation is that Well took the neighbourhood-pharmacy volume slot that Tesco Extra would have taken in a less compact city, and the slot doesn't support a second mid-tier chain at scale.

3. Boots is unusually dominant at the vacancy level. Cycle 16 measured Plymouth PL1 Boots at 64.7% of total local pharmacy vacancies — the highest local chain multiplier in the atlas. With Boots running 11× the next retail chain's vacancy count and Well providing the community-pharmacy supply, Tesco would be entering a market where the hiring dynamics and patient-flow dynamics are already split between two incumbents. There isn't an obvious commercial wedge.

What Plymouth's pharmacy job market looks like without Tesco

The downstream effects of the zero-Tesco finding matter for anyone searching for supermarket-pharmacy roles in Plymouth via the PharmSee jobs feed:

A pharmacist targeting a Plymouth supermarket-pharmacy career has exactly one employer of interest (Morrisons) in the 3-mile ring. If they want chain-community-pharmacy instead, they face the Well and Boots duopoly: 24 branches combined, running 80-90% of the local chain pharmacy volume between them. Anyone wanting Tesco specifically must either accept a 4+ mile commute to Roborough / Lee Mill / Saltash, or change employer.

This constrains the local pharmacist job market in ways the atlas-wide numbers don't show. Plymouth's two-speed pharmacist market is in practice a one-speed market: Boots or Well or nothing at the community level. The NHS hospital + PCN tier adds a third lane, but the supermarket lane that exists in most other atlas cities simply isn't present here.

Is Plymouth a commercial gap for Tesco?

The surface answer is yes — 43-pharmacy catchment, 64 GP practices, 1.49 GP-to-pharmacy ratio, no Tesco presence. By the site-selection logic PharmSee applied to Cohens's Warrington extension, a Tesco pharmacy entry to PL1 city-core would have commercial space.

The deeper answer is no — Tesco's format is out-of-town retail with parking, and Plymouth's retail-park geography places that format outside the 3-mile city-core ring. Tesco already serves Plymouth from Roborough / Lee Mill / Saltash. Adding a city-centre Tesco pharmacy counter would require Tesco to move against its established format preference for a single mid-size catchment — commercially unlikely.

The more accurate framing is: Plymouth's retail geography is the reason the atlas measurement shows zero Tesco, not that Plymouth is a Tesco-free city. Tesco pharmacy is present in the wider Plymouth travel-to-work catchment, it just doesn't sit inside the 3-mile ring the atlas measures. This is a measurement-artefact finding as much as a commercial one, and the cleaner interpretation is "Plymouth's city-core retail ring doesn't intersect with Tesco's out-of-town format preference."

Why the atlas still reports it

PharmSee reports the zero-Tesco finding as a headline because the atlas uses consistent 3-mile city-core rings for every measured city, and Plymouth is the only city where that methodology produces a zero. If we widened the Plymouth ring to 8 miles, Tesco would appear — but so would a lot of other coverage that would distort comparisons to Liverpool, Sheffield and Manchester. The zero-Tesco finding is a measurement-level signal that Plymouth's retail geography diverges from the eight other cities, and that divergence has downstream effects on the local market regardless of whether the surrounding travel-to-work area has Tesco Extra stores.

For readers exploring this: PharmSee's pharmacy search reflects the 3-mile ring used in the audit. The location analyser allows custom radii if you want to widen the ring and include Roborough / Lee Mill / Saltash. For the Boots-specific Plymouth story, the Boots 11× vacancy multiplier piece covers why Boots dominates the local hiring signal so heavily.

Sources: NHSBSA Open Data, NHS Digital ODS pharmacy register, PharmSee cycle 20 /api/location/analyze pull against PL1 1AA with radiusMiles=3.