ShortchangedSubmit
Hartley's

Hartley's Strawberry Jam 300g

No value lost·no change on record
0/ 100

Brand head-to-head

Strawberry jam

Hartley's
Hartley's Strawberry Jam 300g
35%declared fruit
300g · £1.30 (£0.43/100g)
£1.24 per 100g of fruit
What the actual fruit costs, filler stripped out
This packLeast fruit
Stamford Street Co.
Stamford Street Co. Strawberry Jam 454g
35%declared fruit
454g · £0.49 (£0.11/100g)
£0.31 per 100g of fruit
What the actual fruit costs, filler stripped out
Best buy
Sainsbury's
Sainsbury's Strawberry Jam 454g
41%declared fruit
454g · £0.89 (£0.20/100g)
£0.48 per 100g of fruit
What the actual fruit costs, filler stripped out

Three jars of strawberry jam on the same shelf, judged on the one number the label buries: how much fruit went in per 100g of jam, the rest being sugar. The Sainsbury's jar has the most fruit at 41%, but the budget Stamford Street jar matches big-brand Hartley's on fruit (35%) at a fraction of the price, so it gives the most real fruit for your money. Hartley's is by far the dearest per pound of fruit.

Ranked by cost per 100g of actual fruit — shelf price with filler stripped. Sources on each pack's own page.

How the score is built

Shrink · quantityNo data
No pack-size change on record for this product.
Skimp · qualityNo data
No recipe change on record for this product.

Value Erosion Score 0/100. We have no documented change for this product yet. How we score.

The receipts

  1. Jun 2026Recipe
    35% fruit
    Prepared with 35g of fruit per 100g of jam. GBP1.30 standard for 300g (GBP4.33/kg); a Nectar price showed on capture date but the standard shelf price is used for the value metric. The big-brand jar, and by far the dearest per pound of real fruit.
    Verifiedsainsburys.co.uk

Sources