Guided & commented tours

From 11 March until 1 April , ... From 7 April until 1 May , ... From 8 until 9 May , ... From 14 until 16 May , ... From 23 until 25 May , ... From 7 July until 28 August

On Sunday 5 Apr , On Wednesday 8 Apr , ... On Saturday 11 Apr , On Monday 13 Apr , On Wednesday 15 Apr , On Friday 17 Apr , On Sunday 19 Apr , On Tuesday 21 Apr , On Thursday 23 Apr , On Saturday 25 Apr , On Wednesday 29 Apr , On Friday 1 May , On Sunday 3 May , On Sunday 10 May , From 14 until 15 May , ... From 24 until 25 May , ... On Sunday 31 May , On Sunday 7 Jun , On Sunday 14 Jun , On Sunday 21 Jun , On Sunday 28 Jun , On Wednesday 29 Jul , On Sunday 2 Aug , On Wednesday 5 Aug , On Sunday 9 Aug , On Wednesday 12 Aug , On Sunday 16 Aug , On Wednesday 19 Aug , On Sunday 23 Aug , On Wednesday 26 Aug , On Sunday 30 Aug

On Sunday 5 Apr , On Sunday 12 Apr , ... On Sunday 19 Apr , On Sunday 26 Apr , On Sunday 3 May , On Sunday 10 May , On Sunday 17 May , On Sunday 24 May , On Sunday 31 May , On Sunday 7 Jun , On Sunday 14 Jun , On Sunday 21 Jun , On Sunday 28 Jun , On Wednesday 1 Jul , On Friday 3 Jul , On Sunday 5 Jul , On Tuesday 7 Jul , On Thursday 9 Jul , On Saturday 11 Jul , On Monday 13 Jul , On Wednesday 15 Jul , On Friday 17 Jul , On Sunday 19 Jul , On Tuesday 21 Jul , On Thursday 23 Jul , On Saturday 25 Jul , On Monday 27 Jul , On Wednesday 29 Jul , On Friday 31 Jul , On Sunday 2 Aug , On Tuesday 4 Aug , On Thursday 6 Aug , On Saturday 8 Aug , On Monday 10 Aug , On Wednesday 12 Aug , On Friday 14 Aug , On Sunday 16 Aug , On Tuesday 18 Aug , On Thursday 20 Aug , On Saturday 22 Aug , On Monday 24 Aug , On Wednesday 26 Aug , On Friday 28 Aug , On Sunday 30 Aug

From 3 November until 30 April , ... From 1 until 7 May , ... From 8 until 15 May , ... From 16 until 31 May , ... From 1 until 30 June , ... From 1 July until 31 August

On Saturday 4 Apr , On Saturday 11 Apr , ... On Saturday 18 Apr , On Saturday 25 Apr , On Saturday 2 May , On Saturday 9 May , On Saturday 16 May , On Saturday 23 May , On Saturday 30 May , On Saturday 6 Jun , On Saturday 13 Jun , On Saturday 20 Jun , On Saturday 27 Jun , On Monday 27 Jul , On Saturday 1 Aug , On Monday 3 Aug , On Saturday 8 Aug , On Monday 10 Aug , On Saturday 15 Aug , On Monday 17 Aug , On Saturday 22 Aug , On Monday 24 Aug , On Saturday 29 Aug , On Monday 31 Aug

From 3 until 6 April , ... On Sunday 12 Apr , On Tuesday 14 Apr , On Thursday 16 Apr , On Saturday 18 Apr , On Monday 20 Apr , On Wednesday 22 Apr , On Friday 24 Apr , On Sunday 26 Apr , From 1 until 3 May , ... From 8 until 10 May , ... From 14 until 17 May , ... From 23 until 25 May , ... On Sunday 31 May , On Sunday 7 Jun , On Sunday 14 Jun , On Sunday 21 Jun , On Sunday 28 Jun , From 1 until 31 July , ... From 1 until 31 August

On Saturday 4 Apr , On Saturday 2 May , ... On Saturday 6 Jun , On Friday 17 Jul , On Friday 14 Aug , On Saturday 12 Sep

From 2 April until 24 September

From 3 April until 25 September

From 1 until 30 April , ... From 1 May until 30 June , ... From 1 until 31 July , ... From 1 until 31 August , ... From 1 until 30 September

From 1 until 30 April , ... From 1 May until 30 June , ... From 1 until 31 August , ... From 1 until 30 September

From 1 April until 31 July , ... From 1 until 30 September