The 20 most expensive League One transfers - including ex-Portsmouth and Sunderland strikers, Sheffield United defender, Nottingham Forest pair and more!

With the football transfer market inflating in recent years, League One has seen its fair share of ‘big-money’ moves.

This has seen clubs across the division parting with large sums of money to improve and enhance their squads in years gone by.

So who makes the list of the biggest third tier transfers of all time?

Pompey have one figure from their past in the top 10.

The numbers in the list may not be the exact fees, but they’ve been detailed by Transfermarkt.com and Soccerbase.

Nonetheless, here are the top 20 expensive figures paid by League One clubs for transfers.

5. Kieran Agard - 16th

From: Rotherham To: Bristol City Reported transfer fee: £750k Date: 2014 Picture: BEN STANSALL/AFP via Getty Images Photo: BEN STANSALL

From: Crawley To: AFC Bournemouth Reported transfer fee: £800k Date: 2012 Picture: ANDREW YATES/AFP via Getty Images Photo: ANDREW YATES

From: Swindon To: Charlton Reported transfer fee: £800k Date: 2016 Picture: Ker Robertson/Getty Images Photo: Ker Robertson

From: Crystal Palace To: Southampton Reported transfer fee: £800k Date: 2010 Picture: Mike Hewitt/Getty Images Photo: Mike Hewitt