| 18 Products | Apr 2025 | Apr 2026 | Change |
| Sainsbury's British Smoked Mackerel Fillets (140g) | £1.95 | £3.50 | + £1.55 79.5% increase |
| | £1.95 | £3.50 | + £1.55 79.5% increase |
| Sainsbury's Mackerel Fillets in Sunflower Oil (82g*) (125g) | £0.95 | £1.30 | + £0.35 36.8% increase |
| | £0.95 | £1.30 | + £0.35 36.8% increase |
| Sainsbury's British Hot Smoked Peppered Mackerel Fillets (approx. 280g) () | £3.64 | £15.00 | + £11.36 312.1% increase |
| | £3.64 | £15.00 | + £11.36 312.1% increase |
| Princes Mackerel Fillets in Olive Oil (90g*) (125g) | £1.75 | £1.75 | £0.00 No change |
| | £1.75 | £1.75 | £0.00 No change |
| Sainsbury's Mackerel Fillets in Spicy Tomato Sauce (125g) | £0.95 | £1.30 | + £0.35 36.8% increase |
| | £0.95 | £1.30 | + £0.35 36.8% increase |
| Princes Mackerel Fillets in Mustard Sauce () | £1.75 | £1.75 | £0.00 No change |
| | £1.75 | £1.75 | £0.00 No change |
| John West King Oscar Mackerel Fillets in Olive Oil (115g) | £2.00 | £2.00 | £0.00 No change |
| | £2.00 | £2.00 | £0.00 No change |
| Graal Mackerel Fillets in Tomato Sauce (170g) | £1.30 | £1.90 | + £0.60 46.2% increase |
| | £1.30 | £1.90 | + £0.60 46.2% increase |
| Princes Mackerel Fillets in Spicy Tomato Sauce () | £1.75 | £1.75 | £0.00 No change |
| | £1.75 | £1.75 | £0.00 No change |
| John West King Oscar Mackerel Fillets in Lemon Oil Drained (115g) | £1.50 | £1.50 | £0.00 No change |
| | £1.50 | £1.50 | £0.00 No change |
