Here's a list of the Asda stores stocking Monster Pumpkins. They're available while stocks last, so please call ahead to check availability if you're planning a journey specially:
Abbey Park
Aberdare
Aberdeen Beach
Accrington
Aintree
Alloa
Altrincham Broadheath
Andover
Antrim
Arnold
Arrowe Park
Ashington
Ashton
Ayr
Ballyclare
Bangor
Barnes Hill
Barnsley
Barrow
Barry
Basildon
Basingstoke
Bearsden
Bedminster
Belfast Shore Road
Benton
Bexley Heath
Biggleswade
Bilton-Hull
Birchwood
Birkenhead
Bishop Auckland
Blackburn
Blackpool
Blackwood
Bloxwich
Blyth
Bodmin
Boldon
Bolton
Boston
Bournemouth
Bradford
Bridge Of Dee
Bridgend
Bridgwater
Brierley Hill
Brighton
Brighton Marina
Broadstairs
Bromborough
Brynmawr
Burgh Heath
Burnden Park
Burnley
Bury St Edmunds
Byker
Caerphilly
Cambridge
Cannock
Canterbury
Carcroft
Cardiff
Cardiff Bay
Carlisle
Castlepoint
Chadderton
Charlton
Chatham
Chelmsford
Chelmsley Wood
Cheltenham
Chesser
Chester Greyhound
Chorley
Clapham Junction
Clayton Green
Clydebank
Colchester
Coleraine
Colne
Cookstown
Corby
Coventry
Crawley
Crewe
Cumbernauld
Cwmbran
Dagenham
Darlaston
Derby
Dewsbury
Doncaster
Donnington Wood
Downpatrick
Dudley
Dumbarton
Dunbar
Dundee Milton Of Craigie
Dundonald
Dunfermline
Dunstable
Eastbourne
Eastgate
Eastlands
Eastleigh
Edinburgh
Elgin
Ellesmere Port
Enniskillen
Falmouth
Fareham
Farnborough
Ferring
Fleetwood
Frome
Galashiels
Gateshead
Gillingham Pier
Glasshoughton
Glenrothes
Gloucester
Golborne
Gosforth
Gosport
Govan
Grangemouth
Grantham
Gravesend
Great Bridge
Great Yarmouth
Greenhithe
Grimsby
Halifax
Hamilton
Harlow
Harrogate
Hartlepool
Hatfield
Havant
Hayle Harbour
Hereford
Hessle
High Wycombe
Hinckley
Horwich
Huddersfield
Hull Mount Pleasant
Hulme
Hunts Cross
Huyton
Hyde
Ipswich
Irvine
Isle Of Dogs
Keighley
Kendal
Kettering
Kilkeel
Killingbeck
Kilmarnock
Kingshill
Kingswood
Kirkcaldy
Lancaster
Langley Mill
Leamington
Leckwith Road
Leicester
Leigh
Leyton
Lincoln
Linwood
Liscard
Livingston
Llandudno
Long Eaton
Longwell Green
Lower Earley
Lowestoft
Luton
Mansfield
Melksham
Merthyr Tydfil
Middlesbrough
Middleton
Milton Keynes
Minworth
Morley
Motherwell
Newark
Newport
Newport Isle of Wight
Newton Abbot
Newtownards
Norwich
Norwich Hall Road
Nuneaton
Oadby
Oldbury
Omagh
Park Royal
Parkhead
Patchway
Pentwyn
Perth
Peterlee
Pilsworth
Plymouth
Poole
Portadown
Portlethen
Portsmouth
Preston Fulwood
Pudsey
Queensferry
Queslet
Radcliffe
Rawtenstall
Reddish
Redditch
Rhyl
Robroyston
Rochdale
Roehampton
Rotherham
Runcorn
Rushden
Scunthorpe
Sefton
Shaw
Sheffield
Sheffield Drakehouse
Shipley
Shirley
Shoeburyness
Shrewsbury
Sinfin
Sittingbourne
Skelmersdale
Slough
Southgate Circus
South Ruislip
South Shields
South Woodham Ferrers
Southport
Spennymoor
St Leonards On Sea
St Matthews
St Austell
St Helens
Stafford
Stanley
Stevenage
Stockport
Stockton
Strabane
Straiton Edinburgh
Sunderland
Sutton Ashfield
Swanley
Swansea
Swindon
Swindon Haydon
Tamworth
Taunton
Telford New
Thurmaston
Tilbury
Tipton
Tonypandy
Torquay
Toryglen
Totton (Southampton)
Trafford Park
Tunbridge Wells
Tunstall
Wakefield Durkar
Wallington
Walton
Washington
Watford
West Bridgford
Westbrook
Weston-Super-Mare
Westwood Belfast
Weymouth
Wheatley
Widnes
Wigan
Wolstanton
Wolverhampton
Worcester
Workington
Wrexham
Wythenshawe
Yeovil
York